Our best-selling bottle, the Big Mouth 24oz is conveniently shaped and absolutely leak-proof. It has a tight-sealing Big Mouth screw top that's ultra-wide for adding things like ice or your hydration powder of choice. This piece also provides an incredible level of water flow that's up to 50% greater than the competition. Meanwhile, we gave the bottle a flexible, ergonomic design that grips to cages and fits easily in the hand, while the bottle's construction is made from BPA-free plastic that's 100% FDA food-grade approved. Tight-sealing Big Mouth screw top is wide enough for ice cubes and powder drink mix. Wide water channel delivers 50% greater flow than other leading bottles. Plus improved functional outsideÂ grip.Large, soft reliable poppet top is easy to activate, delivers excellent flow, and seals tight. 100% Leak-free.Easy to grab, flexible, and ergonomic design and durable.Also available in 21oz Little Big Mouth option.BPA-free plastic made from 100% FDA food-grade materials and printed with non-solvent base (UV cured), CPSC-approved ink.