I use this thing in the gym as my water bottle, whey protein storage, and pre-workout supplement container. It also holds my locker keys. All these functions in one single item saves me a lot of gym bag space, it made my regular gym visits much more convenient.
I also keep a stocked one everyday, whenever i need my protein dose midday at work.
Top quality materials, i have never seen any protein shaker so well made. Unlike the cheap ones, it never stinks and i dont taste spoiled shakes when i use it as my gym water bottle.