CamelBak 100l hydration pack. Issued to me in the Army in 2006. I broke the mouthpiece, they sent me a whole new reservoir, tube, the works. : r/BuyItForLife
CamelBak Sports & Outdoors | Mercari
CAMELBAK OMEGA WATER BEAST MIL SPEC 3.0L / 100oz HYDRATION RESERVOIR BLADDER | eBay