Here's what other sites are saying:
Kokatat Camp & Hike Tributary Hydration System-Red LVATRB2RD0. Also available as Tributary Rear Pocket only without reservoir.
When you're completely surrounded by water, it can be easy to forget to take a drink every now and then. Stay hydrated while you're paddling under the hot sun with the Kokatat Tributary Hydration System with Reservoir. It attaches to almost all Kokatat PFDs and includes a 1. 5 liter reservoir so you can have easy access to fresh water whether you're battling whitewater or SUPing across a serene lake. The tough Cordura fabric can take a beating if you get tumbled in rapids, and a zippered stash pocket stores small accessories.
Kokatat Tributary Lifejacket Hydration System Pack - Get easy water access with the Tributary Hydration System from Kokatat. This reservoir is perfectly designed with an accessible bite valve and attaches to most Kokatat PFDs as well as many other lifejackets on the market. Not only is there plenty of water for your paddling adventure, a zippered stash pocket lets you store small items. Reflective highlights provide low-light visibility for evening paddles. Enjoy a nice day on the water, hands and thirst-free, with the Kokatat Tributary Hydration System.
With the Kokatat Tributary Hydration System, you'll be able to easily stay hydrated while you're out on the water...without having to worry about your water bottle rolling juuust out of reach inside your cockpit. This product will be shipped directly from Kokatat and will leave their warehouse in 1-2 business days. Eligible for UPS ground shipping only.. . . Includes Hydrapack Elite 1.5 L reversible reservoir with "plug-n-play" connector and 36 in. tube. Zippered stash pocket stores small essentials. Reflective highlights enhance visibility for increased safety. Attaches to all Kokatat PFDs with full-foam back (except SeaO2 and Orbit). Reservoir is PVC- and BPA-free