Rating: 1 / 5
This is not reservoir, but I think I have a useful review. I bought 2 of these tubes. One leaked all over my pack and my tent.
The leak came from the "built in" valve in the cap. I contacted Evernew and got a response saying that the valve was not made to work upside down and that I should not use it upside down. I found that insulting because, Why the heck would I turn it upside down? The inside tube goes all the way to the bottom. If I turned it upside down, I'd just suck air. I wrote back to explain (nicely) it leaked while lying down on its side, not being used. And I mentioned that the other tube did not leak.
A week later, I wrote again and got an apology and a lame excuse about the valve not being designed to completely shut out the water. The rep completely ignored my statement that the second tube didn't leak. He insulted me again by instructing me again to use the bladder in the upright position. But at least, he offered my money back.
Why a pressure relief valve is needed on a soft-sided container is beyond my and my 10 years of engineering education.
I'll keep the non-leaking tube, but I don't like it very much. There is a constriction small enough to significantly impede the flow of water, when compared to the Platypus and Cambelbak hydration tubes.