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
How to Clean a Camelbak - 3 Quick & Easy Methods! — She Dreams Of Alpine
The 5 Best Hydration Packs for Day Hikers | Reviews by Wirecutter