Review on Hydrapak UltraFlask Collapsible Soft Water Bottle For Hydration Pack by Mark Raj

Used these a handful of times now and I am a big fan! The opening is big enough to add some ice, it also makes it easy to add powdered drink mix for your preferred supplement or sports drink. I have used several other brands and they all imparted some kind of plastic-y taste on my drink - BUT NOT THESE!I love that they have the regular caps as well as straws, I often carry one on a shorter run and use the regular cap; on a longer run I will carry 2 in my running vest and the straws keep me from having to take them out of my pockets. I haven't had any problems with leaks as long as the caps are on securely.I would prefer a clear bottle with some graduations to indicate the amount of liquid remaining to help judge how much I've been drinking but thats my only complaint with these.