Features:
1.Slide-lock system--get rid of the trouble of opening traditional switch cover.
2.Hanging system for backpack
Stable handle for water bladder
3.Full opening bag design--easy to put your hand inside to clean & make it dry.
4.Quick-connect outlet and tube together
5.Bite and suck design
* Convenient assembling with backpack: put bladder body filled with water in bag, then connect tube in one second without leaking.
