What Our Gearhead(R) Experts Are Saying:"This reservoir is a no-brainer for outdoor adventures. It's easy to clean, doesn't kink, and the bite valve delivers steady flow without leaks."The Ultimate Direction 1. 5L Reservoir is our reliable hydration partner for every outdoor pursuit. It is designed for rugged adventures and boasts a durable, insulated construction to keep fluids at the perfect temperature while you tackle trails or climb peaks. The wide-mouth opening makes filling and cleaning effortless, and the Plug-N-Play drink tube simplifies refills on the go. The high-flow bite valve self-seals to prevent leaks, while the flexible, kink-resistant tubing ensures steady hydration when you need it most.