From the three brands I've tested I like this one the best. It Drips less. I might add I added to it the 90degree angle with shut off valve, and the Big Bite mouth piece. Water tastes great from it. The only downside is the large Fill Opening. I'm not what I consider weak, but it makes my fingers sore opening the thing. It always opens but seems to take much more effort than i think would be necessary, Also opening size would have been handy to standardize it to Nalgene/MSR size for my water filter.