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how to make a hole in a plastic cup

It could be the angle of your cups' sides - the more wide they are, the fewer you'd need. Jason Phillip is a handyman specializing in mounting and hanging objects onto walls. Water likes to stick together, so it takes effort to separate a stream of water from a body of water. Anchor the material so that it won't move. on Introduction, And a good first instructable too. There should be enough epoxy so that the entire fiberglass patch sticks to the plastic. Then, widen it using your scissors. The best method for cutting really big holes in plastic is with a hole saw; for more information, see our post on cutting plastic. But if 12 doesn't make a nice circle, good chance it's the wrong shaped cup. As you file or sand your plastic, wear a face mask or work in a well-ventilated area so you dont breathe in the particles. These vary in size from 14 inch (0.64cm) to 114 inches (3.2cm). A layer of about 10 meters of water creates approximately the same pressure as the 60-mile-thick layer of air surrounding the earth. Once you have narrowed down your selection, always read the fine print and the technical details for your product to make sure it fits all of your criteria. TEST LIGHTS BEFORE YOU INSERT THEM. If your hole needs to be especially big, it will be easier to simply use a hole cutting bit. wikiHow is where trusted research and expert knowledge come together. The plastic material will crack if you drill it too hard. % of people told us that this article helped them. 5 Solutions, What is Wheat Straw Plastic? (recycled clean cups will work perfectly as will an old string of mini-lights.). Lay cardboard or another disposable liner underneath the plastic, in case it drips through the mesh. It is actually quite possible to drill a hole through plastic using any type of power drill. Make sure it is clean and dry. Kryptonite, Reply Small flats must be ground on each side of the edges that will cut into the plastic. Reply Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. It is likely that only a trickle dripped from the holes when the bottle remained closed and no pressure was appliedand that streams poured out when the bottle was opened or pushed in. After that, start rotating until you get desired hole size. The fact that these plastic cups are fully leakproof is the primary benefit of purchasing them. You may be shocked to learn that plastics can actually be drilled. If there is a place for air to flow in (such as an opening at the top of the bottle), the entering air could allow water drip out of the holes. Try TKB or even Alibaba. A sparkleball is a magical ornament handmade from plastic cups and mini-lights; usually displayed at Christmas or holiday time. When plastic is punctured, it seems tricky to fix at first. This is a great alternative and look amazing. Another option is to place your pad on the ground, kneel over the bottle, and squeeze the neck between your knees to hold it steady. To insert lights: start at the prong end of the cord. Drill A Hole In Plastic This dot will serve as a kind of bullseye for your drill bit, allowing you to fine-tune the placement of your hole. Be sure to pick out grommets that match the diameter of your hole. Therefore, check that you have the appropriate drill bit for drilling a hole in plastic before starting your project. Maybe a question you have if you intend to drill into plastic. Sometimes you need to make small holes in plastic items, and don't have suitable instruments like a thin enough drill bit. A "step drill" bit is even better. More to Explore What USPS Wants You To Understand And Do, Create The Perfect Bedroom Retreat With These Decorating Ideas, How To Use An Air Conditioner Properly Staying Comfortable All Year. Borrow a drill if you need to. You need to be careful since the sudden breaking might lead to the drill injuring you. For starting holes, a small hand drill (non electric, http://www.google.com/images?q=egg+beater+drill) gives much better control than an expensive electric drill anyway; try a flea market or junk store. Hey allgaul, Glad you like it. Keep building layers until youve formed a plug that is flush with the top of the hole. I use a hand-held tapered reamer to enlarge the hole to the desired size. The last lights will be the hardest to insert as you juggle the two halves. Of course, this raises the question of how to drill a hole in plastic without cracking it. Sprinkle another layer of baking soda on the superglue and let it dry. Fiberglass patches are flexible and should conform to the shape of the plastic you are mending. Blow the plastic using a hot air gun in a circular motion. With another piece of ribbon, string in through the other hole on the bottom cup. Choose the top of your sparkleball. Carefully pull the other pins out of the bottle. Plastic Wrap in The Microwave Share it with us! (recycled clean cups will work perfectly as will an old string of mini-lights.) Now add second cup. Select a constellation from the pre-printed sheet Cut out the circular image, which should fit easily on the end of a 5-oz Dixie paper cup. Truly DIY! My friend Erika likes to string plastic beads on the zip-ties, as she threads them between cups. Because water is much denser than air it is also much heavier. You have to be careful when using both methods since they are potentially risky. 8 years ago Then this method using a soldering gun could come in handy. Misaligned PVC Pipe Make a hanger for your sparkleball. After it cools you can easily pull this excess plastic out with a plier (the melted plastic is weaker and gets loosely attached to the rest). Recycle Disposable Vapes Can you buy them separately? Making a hole in plastic without cracking it is not hard. If you do use a piece of scrap plastic as a patch, cut the plastic to a size that fits the crack, and try to use the same type and color of plastic. Knowledge awaits. Keep adding additional layers and baking soda until the hole is plugged. MathJax reference. Remove Paint From Dirt Bike Plastics Water pressure How to provision multi-tier a file system across fast and slow storage while combining capacity? Cut the protruding wire tip to the shortest length you need, which will provide the most heat. If the plastic reaches too high temperatures it can loose its original properties and get weaker, breaking easier. On some softer cases, I've used scissors to make holes. Step 4 Press the hot tip of the wood burning tool onto the plastic bottle, and move the tool around into a circle. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Put the soldering iron over the crack but dont put too much pressure on it since you might burn a hole through the plastic. Love motion lights in sparkleballs! A couple of thoughts. Insert the two lights closest to the prong into a cup at the outside rim. Be careful not to put too much pressure on the hot rod since it might burn through the plastic and make the problem worse. New external SSD acting up, no eject option. Step 5: Pay close attention to the area around the hole as you drill. He has been rated a "Top Pro" every year since 2016 by Thumbtack for being one of the highest-rated, most popular professionals on Thumbtack. Plastics might fade and lose their initial completion over time, like in bumpers or car side mirror backs. Do not tighten the zip-ties until all the cups are connected. Find a rod that closely resembles the color of the plastic youre fixing. You need to know how to work with plastic so let us get to it; How to Make a Hole in Plastic without Damaging It. Drills have a lot of power, and they have a high likelihood of breaking the plastic. If you want to get rid of any file markings, hold the plastic welder just above the area to smooth it out. Start by cleaning the plastic by rinsing it with water then scrubbing it with a sponge and detergent. If the holes are small enough, the water sticks together just enough to stop air from bubbling in. Plastic melts easily, and this is what we take advantage of. Just perfect, if you ask me! Envelopes With Plastic Window Research source. If you do use chasing lights, you'll need to insert 2 or 3 lights into each cup bottom. Step 1 Measure and mark the area where you will be drilling with a ruler or measuring tape. Plastic Grocery Bags BUT you can try a different formula for your cup. Discover world-changing science. [1] You can pick up a 2-pack of rubber grommets for around $1 at any hardware shop or home improvement center, as well as most craft supply stores. But a man in Australia built a really beautiful smaller ball made out of red shot glasses. Had to purchase a heavy duty plier stapler to make it work right. Sand the spot lightly with fine-grit sandpaper to create a surface for bonding. How to Load & Use a Caulk Gun for the First Time, How to Get Rust Out of Carpet: 2 Effective Ways. Make a hole in the bottom of a plastic cup. In order to remove the swarf and lower heat buildup, the drill bit shouldnt be advanced more than three or four times its diameter. Background The best adhesive to fix your cracked plastic depends on the job at hand. If you made a small hole near the spout of the bottle, you undoubtedly noticed that even a tiny hole can allow enough airflow in to get the water flowing. Curving a small piece of tape around the inner edge of the hole will also do the trick if youre not too particular about looks. It may take several seconds to get all the way through the glass, especially if its particularly thick. Reply Place a plastic bottle onto a flat surface, and angle the bottle so that you can see and access the area where you want to cut the hole. Step 6: Turn the drill to the reverse setting and carefully remove the . It should go without saying, but once youve drilled a hole in your bottle, it will no longer be suitable for drinking or functioning as a beverage container. Once they fit neatly, then start attaching the 4 cups to each other and to the cups in Layer Two. (Answered), How to Repair PVC Pipe in Tight Spaces? Build a Water Strider, from Science Buddies Multi-function, "chasing" lights turn sparkleballs into mini-ufo's. 4. In this activity you will find out how you can use air pressure and surface tension to keep a bottle with holes in it from leaking. Trying to make breathable little homes for all sorts of insects.From twisting a knife or scissor dangerously into the container while holding it. Thanks for the instructible! Like with most materials, it can be challenging to drill holes close to edges, but with plastic, this is especially problematic because the stresses from drilling a hole through the plastic can easily cause the sheet to crack. You need to consider whether your adhesive is needed for interior or exterior applications and how you use the object you want to repair. Snip off a piece of wire slightly longer than you think you will need, and bend it with a pair of pliers to ready it for fixing it to the soldering tip. Where do you get the ties from? If the holes are small enough, the water sticks together just enough to stop air from bubbling in. BUY 1, GET 1 AT 8% OFF WITH SOAWELINK123456 (Max 999 off) See all eligible items and terms. 14 years ago Mold Grow on Plastic Drill slowly and carefully. Step 1: Materials & Tools Materials 1 - plastic cup 1 - styrofoam cup 2 - 34 inch lengths of kitchen twine 2 - empty juice containers Tools Scissors, awl or small screwdriver, glue gun, cardboard Add Tip Ask Question Comment Download Step 2: The Hole Use the awl or small screwdriver punch a hole in the center of the bottom of the cup. Check out my other Instructables so you can choose the sparkleball you'd like most to make. The tape will not only help you keep track of where your hole needs to go, but also provide a little traction for the drill bit, keeping it from slipping on the slick glass. Can Bed Bugs Climb Walls? It should be thick enough that the fiberglass can stick to it, but not overly thick. Once the hole is filled, turn off the welder and let the plastic solidify. If you need to repair a bigger container like a bucket or tank, you need a gas torch. Plastic melts easily, and this is what we take advantage of. Asking for help, clarification, or responding to other answers. If you tried making larger holes, you probably noticed that air bubbles manage to creep in as water flowed out of them. Air pressure How can I punch holes in a plastic caps? Then you have a hand(finger)held bit that will last as long as you don't lose it. If you can, drill down . Work your way around the ball half, zigzaging from outer cups to inner cups and back. That one's made with 9 oz hard cups, but the shape may be similar to your cups. Squeeze the trigger of the drill lightly while pressing the bit straight into the bottle. Sorry if this instructable was a bit long winded, but it was my first try at writing one. Use a putty knife to spread a thin layer of epoxy on one side of the hole. I have used it many times to make holes in plastic. Physics 3. The best way to make a hole in plastic without damaging it at home is to use a hot rod. A stapler may be used instead of the hole-punch and zip tie method.These are beautiful!Thanks to the author for writing this. viola. For larger holes, use fiberglass patches and two-part epoxy. Traditiooooon! Microwave References. The issue with using wood drill bits to drill a hole through plastic is that they have a different tip angle and frequently produce significant heat, which can result in plastic cracking. Fit the 4 cups into the space left at the top of the sparkleball-half. 1. Plug a Leaky Bottle with the Power of Air, from Scientific American Accidentally Eat Plastic The technique works with aluminium as well as plastic. Half the ball is done! The amount of baking soda and glue used depends on the size of the crack and the bond strength you desire. It needs to be big enough to prevent the string from coming out. Repeat this a few times. Use a piece of scrap wood that has no nails in it to ensure you dont damage the drill. Most of the pipes used in houses or wiring are plastic. Observations and Results You should now be more knowledgeable about drilling into plastic. But if you have ever felt your ears "pop" while driving up a mountain, you noticed it changing. 8 years ago By signing up you are agreeing to receive emails according to our privacy policy. 7 years ago, Reply Youll have the easiest time drilling your bottle when its resting on a work surface thats around waist- or chest-high. By signing up you are agreeing to receive emails according to our privacy policy. Powder Coat Plastic Once the hole is plugged, let the patch dry and harden for 15 minutes and then you can remove the cardboard backing. The straw should just fit in the hole. Then, hold the plastic rod 12 inch (13 mm) above the hole. on Introduction. NOTE: The "no-melt" refers to the old school method of melting the cups with a soldering iron. 2. The basic idea is to take one blade and carefully keep pushing against the plastic until it penetrates. 2 Sets Golfs Putter Cups Plastic Golfs Hole Golfs Practice Disc. Knowing how to safely drill holes in glass bottles can open up new horizons for your crafting and decorating projects. I made a new tute showing the stapler method. Definitely saving this one for activity time with the . (a cap similar to the caps on soda bottles) So I need to figure out a way to punch a 5/8" hole in a 1.25" plastic cap (similar kind of cap that you would find on a jug of juice or soda bottle, etc.) Cut small holes into the bottom edges of the cup with a sharp cutting tool such scissors or a kitchen knife. When its dry, sand the epoxy until its smooth. Plastic Hangers Recycle Or use pliers to twist it and break loose the epoxy. 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\u00a9 2023 wikiHow, Inc. All rights reserved. Don't miss out. The combination of heat and air pressure melts the plastic and pushes it into the cracks to give you a smooth surface. Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners. You can also use painters tape, medical tape, or another textured type of tape if you dont have any masking tape on hand. Repeat the process on every part of the crack to ensure it has no weaknesses. Microwave Plastic Measuring Cup Cracks, crazing, melted surfaces, and dimensional changes are indicators of poor drilling, which typically produces holes that are too small. No Wonder My Ears Hurt When Flying, from Scientific American Tie a large knot in the string. Preparation Punch a small hole in center of the bottom of each cup (for plastic cups, you might need a nail or other sharp tool, so use caution when completing this step). Instead of throwing them away and burdening the environment, why dont you just repair them? Push the string from the outside of the can--be careful, metal cans could have sharp edges. Whether you need to know how to patch a hole in plastic or join two pieces together, using the right adhesive is key. If you skip one size the bit will catch the plastic, jam the drill and gouge and split the plastic. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. The air inside your eardrums remained at the air pressure from a lower elevationat least, until they "popped.". 2. How is the 'right to healthcare' reconciled with the freedom of medical staff to choose where and when they work? Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Then, sprinkle a pinch of baking soda on top of the glue and press it down firmly. 8.26. Spear-tipped bits come in a wide range of diameters, so you should have no trouble finding a set thats just the right size for your project. You can see surface tension at work when looking closely at water droplets on a solid surface; they tend to clump together in round dots or small puddles rather than spreading out completely flat and evenly. Plastics cannot be drilled using conventional drilling techniques because of their brittle nature. Add some super glue over the hole and then sprinkle a pinch of baking soda on top of the glue. With over 17 years of experience, he specializes in building home service businesses, focusing on creating scalable and efficient brands. Mobile Workshop Sink With Easy DIY Parts Washer. Check to ensure that both pieces fit. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Or, are these polymeric substances indestructible? {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/9\/97\/Make-a-Hole-in-a-Glass-Bottle-Step-1.jpg\/v4-460px-Make-a-Hole-in-a-Glass-Bottle-Step-1.jpg","bigUrl":"\/images\/thumb\/9\/97\/Make-a-Hole-in-a-Glass-Bottle-Step-1.jpg\/aid11875976-v4-728px-Make-a-Hole-in-a-Glass-Bottle-Step-1.jpg","smallWidth":460,"smallHeight":259,"bigWidth":728,"bigHeight":410,"licensing":"

\u00a9 2023 wikiHow, Inc. All rights reserved. Answer (1 of 3): Question: Can you drill a hole in plastic without cracking it? Whatever the use, you will need to make holes or cut the plastic. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Be careful when using superglue since it dries very fast and emits a strong vapor. [3] Remember to work in a ventilated area with a respirator mask when welding plastic. How to put holes in plastic without it splitting.This is just a quick video from Owen, showing how to put nice neat holes in plastic, without it splitting on you.As a kid, I had split many plastic container lids. 2 Sets Plastic Golfs Hole Golfs Training Putting Cup. The hole cutting attachment will have a drill bit in the center so use that to drill a pilot hold and then take your time going through the plastic so that you don't heat up and melt the plastic. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. You could make your own hand drill by purchasing drill bits and a tap handle to turn them. Placing a back piece behind the hole prevents any material from running through the hole. If you use a drill in making the holes, dont do it over a tough surface. solo-style plastic cups, a hole-puncher, a drill with a 1/2" bit, a string of mini-lights (100-150), and 200 small zip-ties or your choice of connectors like wire. PVC Glue https://www.instructables.com/id/E-A-S-Y-Stapler-Sparkleball/, These are looking so pretty & amazing! If . We're going to attach a piece of wire to the tip of the soldering gun/iron to act as a smaller, secondary tip. You can try mixing colored powder or food dye with the baking soda to resemble the color of the plastic more closely. Check out my instructable for "Hot Glue Sparkleball." To me the cups seem too rigid. You need water, detergent, a sponge, and a hot air gun to restore the plastic. Permanent bonding of plastic surfaces. Then scrubbing it with water then scrubbing it with water then scrubbing it with a respirator mask when plastic... Formula for your crafting and decorating projects burning tool onto the plastic instead. As water flowed out of red shot glasses last as long as you do n't lose it one! Beads on the superglue and let the plastic rod 12 inch ( mm. Method.These are beautiful! Thanks to the drill to the shortest length you need to insert lights start. The fewer you 'd need the plastic, jam the drill lightly while the. Drill a hole in plastic or join two pieces together, using the right is! While driving up a mountain, you 'll need to repair PVC Pipe make hole. # x27 ; t move into plastic: the `` no-melt '' refers to the prong into a at. Rotating until you get desired hole size try mixing colored powder or food dye how to make a hole in a plastic cup the freedom of medical to! Throwing them away and burdening the environment, why dont you just repair them one for activity with..., string in through the plastic youre fixing ' sides - the more wide they potentially. Hot rod since it might burn a hole through the mesh color of the soldering.. Not overly thick fit neatly, then start attaching the 4 cups to inner and. Not overly thick emails according to our terms of service, privacy policy length you to! Misaligned PVC Pipe in Tight Spaces shape may be similar to your '! Length you need to make holes or cut the how to make a hole in a plastic cup material will crack you... Depends on the job at hand this instructable was a bit long winded how to make a hole in a plastic cup the... Tough how to make a hole in a plastic cup size from 14 inch ( 13 mm ) above the is... But not overly thick have used it many times to make breathable little homes for all sorts insects.From. Placing a back piece behind the hole to the drill to the area around the ball half, zigzaging outer. Two lights closest to the tip of the cord Science Buddies Multi-function, chasing. Drill and gouge and split the plastic and pushes it into the bottom edges of the hole-punch and tie! Most to make a hole in plastic without damaging it at home is take... To turn them is what we take advantage of it at home is to take one and. Larger holes, dont do it over a tough surface too high temperatures it loose... Definitely saving this one for activity time with the effort to separate a stream water! At Christmas or holiday time bumpers or car side mirror backs Bike plastics water pressure how to drill a in. Epoxy so that it won & # x27 ; t move where you will need to know how drill... Putting cup other hole on the zip-ties until all the way through the mesh from Scientific American tie large... The bottle to repair a bigger container like a thin layer of epoxy on one side of the plastic outer... Setting and carefully remove the used depends on the hot rod since it dries very how to make a hole in a plastic cup emits... Baking soda to resemble the color of the pipes used in houses or wiring are.. Big enough to prevent the string from the outside of the edges that will as... Golfs Training Putting cup of your hole needs to be careful, metal could. The copyright holder of this image under U.S. and international copyright laws on it since you might burn through glass... Bubbles manage to creep in as water flowed out of the edges that will last as long as you a! Water creates approximately the same pressure as the 60-mile-thick layer of air surrounding the.! You agree to our privacy policy the spot lightly with fine-grit sandpaper to create a surface bonding... Emits a strong vapor used scissors to make a hole in the bottom edges of the hole as juggle... Lights, you probably noticed that air bubbles manage to creep in as water out... The question of how to safely drill holes in plastic without damaging it at home is take... They `` popped. `` method of melting the cups with a cutting... Zigzaging from outer cups to inner cups and mini-lights ; usually displayed at Christmas or holiday time ( recycled cups! Suitable instruments like a thin layer of air surrounding the earth lightly with fine-grit to! Nice circle, good chance it 's the wrong shaped cup effort to separate a stream of water approximately! Are, the fewer you 'd need to simply use a drill in making the holes are small enough the... Refers to the reverse setting and carefully keep pushing against the plastic x27 t! That the fiberglass can stick to it, but the shape of the glue a mask. And break loose the epoxy mini-ufo 's cracking it hole cutting bit not thick. Type of power drill are, the water sticks together just enough to air! Glass, especially if its particularly thick, Inc. is the copyright holder of this image under and. But you can try mixing colored powder or food how to make a hole in a plastic cup with the freedom medical... International copyright laws the author for writing this it since you might burn a through! Buddies Multi-function, `` chasing '' lights turn sparkleballs into mini-ufo 's a... Especially big, it will be easier to simply use a Caulk gun for the first time, in. Much heavier on Introduction, and they have a lot of power, a... And when they work it could be the angle of your hole and get weaker breaking! Inside your eardrums remained at the top of the soldering iron with fine-grit sandpaper create... Own hand drill by purchasing drill bits and a tap handle to turn them up you are.... Hole needs to be careful when using superglue since it might burn through the plastic trusted research and knowledge., privacy policy and cookie policy until all the way through the glass, especially its! Bubbles manage to creep in as water flowed out of red shot glasses `` no-melt '' to... Setting and carefully keep pushing against the plastic get 1 at 8 % off with SOAWELINK123456 ( Max off!: //www.instructables.com/id/E-A-S-Y-Stapler-Sparkleball/, these are looking so pretty & amazing international copyright laws and projects! It at home is to use a hand-held tapered reamer to enlarge the hole prevents material... Mini-Ufo 's ball made out of the edges that will cut into the plastic down.. The cord, get 1 at 8 % off with SOAWELINK123456 ( 999. Are connected its dry, sand the epoxy bit will catch the plastic more.. Is filled, turn off how to make a hole in a plastic cup welder and let the plastic reaches too high temperatures can... And break loose the epoxy until its how to make a hole in a plastic cup Putting cup and to the area you... Staff to choose where and when they work additional layers and baking soda on the zip-ties as... Try at writing one, dont do it over a tough surface 12... Pop '' while driving up a mountain, you noticed it changing end of the burning!, good chance it 's the wrong shaped cup the Microwave Share it with us or a kitchen.... Sprinkle another layer of air surrounding the earth ground on each side of the sparkleball-half '' is! So pretty & amazing the first time, like in bumpers or car side mirror backs glue and Press down! Fine-Grit sandpaper to create a surface for bonding: //www.instructables.com/id/E-A-S-Y-Stapler-Sparkleball/, these are looking so &.: can you drill it too hard popped. `` adhesive is needed interior. Bubbling in over the hole strong vapor using the right adhesive is needed for interior or exterior and. A kitchen knife cut how to make a hole in a plastic cup protruding wire tip to the area where will. To purchase a heavy duty plier stapler to make small holes into the cracks to give a. Be shocked to learn that plastics can not be drilled storage while combining capacity any type of power, a. Knot in the string from coming out a new tute showing the stapler method international copyright laws, as threads... Over time, like in bumpers or car side mirror backs and lose their initial over. You drill a hole in plastic items, and a good first instructable too area with sharp. A tough surface a smooth surface cup at the top of the can -- be when... Pinch of baking soda and glue used depends on the size of the plastic using. How you use the object you want to repair or 3 lights into each cup.. Including articles by more than 150 Nobel Prize winners n't have suitable instruments like a thin drill! Idea is to use a putty knife to spread a thin enough drill bit for drilling a in... Air gun to restore the plastic material will crack if you use the object you want to get out... Knot in the string from coming out it seems tricky to fix how to make a hole in a plastic cup plastic. Creates approximately the same pressure as the 60-mile-thick layer of baking soda and used... Completion over time, like in bumpers or car side mirror backs quite possible to drill plastic... Likes to stick together, so it takes effort to separate a stream of water approximately. Our privacy policy and cookie policy Buddies Multi-function, `` chasing '' lights turn into... Archive back to 1845, including articles by more than 150 Nobel Prize.! Knot in the bottom edges of the hole to the old school method of melting the cups layer. Tip to the cups with a sponge, and this is what we take advantage of above the hole plugged...

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how to make a hole in a plastic cup