Klim Hydrapak The Hydrapak is engineered for durability and convenience, offering a robust solution for hydration needs within compatible backpacks. Its slide-seal top facilitates easy filling and ensures a secure, leakproof seal. Designed for high flow, the blaster bite valve automatically seals after each sip and incorporates a twist on/off mechanism to prevent leaks when not in use. Additionally, the plug-n-play system allows for quick disconnection of the drink tube, enabling easy reservoir removal for refill and an auto-shutoff valve to stop leaks. Features: Capacity: 2 or 3 liters Slide-seal top opens wide for easy filling and closes tight for a leakproof seal High-flow blaster bite valve self seals after each sip Twist on/off bar on bite valve prevents leaks when not in use Plug-n-play system connect lets you easily disconnect the drink tube and remove the reservoir from your pack for convenient refilling Auto-shutoff valve prevents leaking when disconnecting drink tube Fully reversible for easy cleaning and drying Top-shelf dishwasher safe Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticityCan be forzen or filled with hot water (Max temp 140F) Safe and reliable, 100 BPA and PVC free