BLACKHAWK! 40oz Anti-Microbial Replacement Reservoir - Black Designed for BLACKHAWK!'s new side hydration pouch, but can add 40 ounces of needed fluids to other packs or pockets as well Comes with quick disconnect bite valve Anti-microbial Quality tested in the field, made of quality materials Designed for BLACKHAWK!'s new Side Hydration Pouch, but can add 40 ounces of needed fluids to other packs or pockets as well Comes with quick disconnect bite valve Buy a fill valve and backfill without removing reservoir Anti-microbial Available in Black, Coyote Tan, and Foliage Green