Our best-selling bottle, the Little Big Mouth 21oz, takes a revolutionary design and scales it down a notch. It has a comfortable shape and is absolutely leak-proof. It has a tight-fitting Big Mouth screw cap that is ultra-wide for adding things like ice or your hydration powder of choice.

This piece also provides an incredible level of water flow that is up to 50% higher than the competition. Meanwhile, we’ve given the bottle a flexible, ergonomic design that grips the cages and fits easily in the hand, while the bottle’s construction is made from BPA-free plastic that’s 100% FDA-approved. alimentary grade.