How many things have I added so far that have to do with water? If you've read in other pins (is that what they're called?) I'm a former infantryman. If you learn one thing, other then the obvious, you learn that hydration is a key to survival. This little baby is impressive. Darn near puncture proof and indestructible. They have shower adapters too, if you must. Buy one. No questions ask. Buy one, fill it, take it with.