I'm not sure we can assume that water bottles would rupture on depressurization. They handle the pressure drop from sea level to 8000 feet (about 4PSI) without any obvious stress. 8000 to 30,000 feet is about another 7PSI. It's by no means unlikley that the bottles that can handle 4 PSI differential would rupture 11. But it's not self evident either.
In fact, if you've ever made a "rocket" from a 2-liter soda bottle, you'd know you can pump several atmoshperes of air into it with a bicycle pump without rupture.