Exploding Water Bottles

Hello world!
Welcome to the shop. Today, the project is: exploding water bottles!

You will need:

  • Drill bits
  • An inner tire for a bicycle or such like
  • A plastic bottle with a screw-on cap
  • Scissors
  • A screw or nail (not pictured)image

(Note: a drill is optional, and it might actually be simpler just to use the bits.)

Start by cutting out the valve. Make sure it is too big rather than too small.


Next, poke a hole in the exact centre of the cap (there is usually an indentation to help you) with a screw or nail.


Now, find a drill bit that is slightly smaller than the valve. Mine was 9/32″.


Hold the bit firmly and twist the bit, the cap, or both (I am using a bench vise, but only because I have one).


Insert the valve into the hole. It should be a snug fit. Then trim the valve to fit the cap.

wpid-20151025_164231.jpg wpid-20151025_164403.jpg

Guess what? We’re done! Now all that’s left to do is pump it up,wpid-20151025_164634.jpg and… Okay. This is a little awkward. Um, so what happened was that while I was trying to take the cap off, something malfunctioned, and it blew up in my face. Fortunately, I got a photo of what it looked like afterward.


Wait, no, that… I, uh, don’t know how that got there… I meant this:wpid-20151025_164716.jpg

Admittedly not so exiting, but that’s life.
You might be wondering what to do with these, so here are some ideas: if you have projectile launchers like slingshots, blowpipes, etc., you can shoot at them and they will make a very nice bang. Alternatively, make some out of coke bottles. When you pressurize those, then unscrew the caps, they will immediately fill with fog. Coke bottles can also be pressurized to insanely high pressures. I myself have gone all the way up to 160 psi! Do not, however, try anything more than 80 psi on water bottles at risk of your own safety. I designed these myself, and I’ve found that by leaving the valves unglued, they can be removed if (and when) the cap is damaged, and be reused.

Anyway, thanks for taking the time to read this, and I will see you (at least figuratively!) in the next post.


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