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I see a lot of reviews on the valve and people not getting enough water. I have used this for over 5 years now(replaced the bottle 4 times for mold inside and just getting disgusting. I figured I would help people out. If you bite down slightly on it and gently squeeze the water pours out. Like a few people said you need to get used to it but I have tried camelbacks and a few others this has by far the best control method and the weight of the botttle itself is less than any other I have seen. Hope this helps! BradB on Apr 4th 2016
This bottle would be great if the top and valve were different. I used my bottle recently on a mid-distance run and mixed some Hammer Heed and an Endurolyte Fizz tablet in it with water, and I got so frustrated with how slow the fluid was released each time I tried to take a sip. In the end, I stopped every time I needed a sip, and I removed the lid completely to allow for a decent amount of fluid. Too frustrating! I probably won't use it again. Just wanted to add that after I submitted the review above, just a few days ago, that I was pleasantly surprised to receive an email from UD apologizing for the inconvenience and offering to give me either a refund or a couple of replacement bottles without the kicker valve. I am so impressed with the level of customer service and very appreciative - thank you UD!!! Jannine on Jul 28th 2014
The water comes out a lot slower than I'd like. Maybe I just need to get used to the valve? I squeeze the crud out of it and don't get much water. Also, the strap that keeps the tightness around my hand does not stay tight. I'm constantly retightening it. It's a pain. I like the pouch to hold my gels though and I can put a key in there. The strap is what really bothers me though:( Frances on Jun 30th 2014
UD's 20oz bottle is the best on the market. The Handy 20 Carrier holds my phone and key like I want. I would like to see the adjustable hand tension strap made of a little stronger material. It requires constant retightening. Brad on Apr 18th 2014