The Kriega HydraPak Shape-Shift Reservoir has a large 2l capacity which has a Shape-Shift baffle construction and High-Flow Blaster bite valve.2L / 70oz unlocked - 1.5L / 4.7 oz lockedFits all Kriega Backpacks and Hydration PacksShape-Shift baffle constructionHigh-flow Blaster bite valve self sealsSlim profile and increase stabilisationSlide-Seal top for easy filling and leakproof sealThe Kriega HydraPak Shape-Shift Reservoir has a Shape-Shift baffle which locks for a slim profile and increase stabilisation, unlocking for full volume. There is also a Slide-Seal top which opens wide for easy filling and closes tight for a leakproof seal.The bite valve on this Hydration Pack is a High-Flow Blaster which self seals after each sip and features a twist on/off bar to prevent leaks when not in use.There is also a Plug-N-Play connect system which lets you easily disconnect the drink tube (an auto shut off valve prevents leaking) and remove the reservoir from your pack for convenient refilling.