But the bottles are fun..
They are built to withstand really high pressures.... If you don't want to lose your fingers, don't try this...
Quarter fill the coke bottle with warm water, bend the plastic bottle (without weakening it!), keeping the water in the bottom half.
Add some crushed dry ice taking care that it does not mix with the water.
Screw the cap on, throw it away as far as you can.
Run in the opposite direction.
Booooooooooooooooooooooooom!
Some of the guys that used to work in my business used to do this, they were very powerful and probably capable of removing your hand.