My Camelbak D.I.Y...Combating dry mouth

[Mambo Dave]

Then, yeah, I'd agree it would work for a few sips like that - before you have to fight the bottle's plastic trying to reform itself. If you tried, I guess you could almost get 3/4 of the bottle empty.

Though if you leave a little air in it, it will compress as you descend, perhaps giving you a pressurized water flow. If you're careful about closing it off, I can't come up with a reason it would be bad.

 

[neophyte]

I've been thinking about this too....for some reason, I thought somebody made one specifically for divers...

Deep Sea Supply does.

DSS Hydration Bladder

It's made with doubles in mind though, at least as far as attachment points.

 

[zach5150]

Deep Sea Supply does.

DSS Hydration Bladder

It's made with doubles in mind though, at least as far as attachment points.

Ah Ha! I knew I saw one somewhere...thanks!

 

[billtodive]

Using a sport bottle, you can drink, then blow air into the bottle.
If you get too much air in, the ascent is interesting. (free-flow in my pocket and listing to port :shakehead )