3 ms·
So what happens if there are no gaps, does the lid go flying off?
by poglet 5y ago
So what happens if there are no gaps, does the lid go flying off?
- mixmastamyk 5y agoApparently yes, read peter's comment: https://news.ycombinator.com/item?id=28914869 https://news.ycombinator.com/item?id=28914869
- totetsu 5y agoTry putting some carbonated drink into a thermo flask with a sealed lid and open it after it's been in your bag.. the seal holds right to the end and the POP. I have a hole in my kitchen ceiling from accidentally storing dry ice overnight in one too.
- mulle_nat 5y agoIf I look at my bottle caps here in Germany, my 0.7l "soda" water bottles, don't have gaps. The Coca Cola glass 0.5l bottles don't have gaps either. Club Mate 0.5l doesn't have gaps. Only the Sprite bottle 1l has gaps. Handlingwise I don't notice any difference. Maybe because it's a learned technique thing, you twist it, let gas evaporate then open it. I don't even think about it.
- pantalaimon 5y agoI think this only works with PET bottles (the thin, elastic ones) as they work a bit like a balloon and can store more pressure energy.
- pantalaimon 5y agoYes! It takes some practice but as a kid i managed to launch the lids off water and soda bottles that had previously been opened (more gas volume) and carried in a bag. You need to edge the cap close to the point before the gas can escape, then give it a flick so it can twist open the last bit by inertia. Apply some pressure to the plastic bottle while doing so. When it works the cap would fly off with a loud bang and the rapid change in pressure causes condensation inside the bottle, allowing you to push out clouds of vapor. I think they changed the design of the bottle at some point and this would no longer work.
- frosted-flakes 5y agoAs kids, we would twist the thin plastic water bottles to compress the air inside, then launch the lids at each other as you described.