- 36 ounces of liquid to allow cyclists to ride further - The largest possible bottle that still fits in a standard bottle cage. Designed for Bikepacking, Randonneuring, and loaded touring - Graduations on the back help the user measure out hydration mixes correctly - Constructed of food-grade squeezable LDPE plastic, BPA-free - Two models available: high flow push/pull valve and big flow squeeze to open, auto seal valve - Made in the USA