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 foodgrade squeezable LDPE plastic, BPA-free\n - Two models available: high flow push/pull valve and big flow squeeze to open, auto seal valve Made in the USA