Durable and leakproof with Lifetime Warranty

Treated with HydroGuard™ to inhibit the growth of bacteria that can cause odors, discoloration or deterioration of the reservoir and tube surface. (Does not protect user against disease-causing organisms. Always wash reservoir after use.)

Extra-large opening for easy filling and cleaning

Patented, proven, Big Bite™ Valve makes it easy to drink

Keeps water fresh - no plastic taste