The mouth on a Camelbak bladder is 3 1/2 inches (89mm) not really a standard size. I could fit the whole Miniworks into my hydratoin bladder LOL. From what I remember about my Miniworks, it was about 2 inches or so in diameter.Yes, it does work. Most hydration bladders have the standard Nalgene sized male fitting (2in, 61mm, something like that), and the Miniworks has the compatible female fitting. However, I found it easier to pump into a Nalgene, then pour from that into the bladder. That way seemed more stable, and didn't risk ripping the fitting out of my bladder.
Yep the older camelbaks had a smaller mouth. But a hose adapter on a Miniworks filter would have been great.I should change my reply from "yes, it does" to "maybe." It works on my Camelbak bladder and a friend's off-brand bladder. Maybe it won't work on the new Camelbak's.
I agree about the output hoses. The Miniworks is a great filter, and can be made better if more versatile.