Simple and full proof
Reviewed by James Holk from Portland, OR on Thursday, October 8, 2015
After reading the other review I immediately filled this admittedly small looking bottle and poured it into my Nalgene and it is actually a little over 16oz / 500ml. I will confess that I had my serious doubts upon initially looking at just how tiny it seems to be, but then the proof is in the pudding and facts don't lie. Not only is it super tiny, but the valve is extremely easy to lock on or off, and even when it is on you won't accidentally spill water while grasping it because it is released by biting down (also no need to tilt your head back, as it is airtight). Lastly, its base adds some great shape and will even keep the bottle standing upright when full. Well done Marmot and thank you STP!