This is a Camelbak Hydration Pack known as the Mil Spec Crux Short Reservoir, model 2023001003.
Why upgrade to a new CamelBak Mil Spec Crux(TM) reservoir when an old reservoir will last forever? Because Camelbak never stops innovating. Their Crux reservoir delivers 25% more water with every sip in a pack loaded with the latest in hydration technology" so you can hunt longer.
Features:
Purpose-built reservoir so you can stay hydrated and hunt longer.
25% more water per sip so you stay better hydrated
Quick Link Hydrolock: Easy one-handed on/off water flow with Quick Link modularity
Hydroguard Technology: Inhibits growth of bacteria on reservoir and tube surfaces
Insulated Tube Cover: Maintains water temperature and protects the tube from harmful UV rays
Angled Exit Port: Optimized for attachment on in-line purifiers and accessories
Self-Sealing Bite Valve: Self-seals after each drink to eliminate drips
Easy Open Cap: Keeps your drinking port clean and leak-proof
Ergonomic Fill Handle: For comfortable, easy filling
Reservoir Baffle: For low profile and easy loading
