Just like the picture and the description. It's a bottle/bag that squished flat and can be rolled up. From what I can tell it is not magic, but it does hold liquid. While I'm not willing to test my theory I firmly believe that if I were to poke it with something sharp, set it on fire or jump on it that it would prove to be destructible. So I won't do those things. I will just use it as intended to hold liquid in a pack. I'm pretty sure it will do a fine job of that.
This review was written in the old system and had content requirements that are different than reviews written today.