Review on Stay Hydrated On The Go With The Hydrapak UltraFlask Collapsible Water Bottle For Hydration Pack by Dave Lopez

I wanted to find easy to use, collapsible bottles that I could put in side pockets for long distance (marathon) running. These worked perfectly for me.I ran a marathon with them - they didn't have a horrid taste (I did wash a couple of times before using), I could fit in my side pockets (running tights), I could take out and put back into my pockets whilst running, I could easily fill at a water station and simply squeezing the top when drinking meant I could suck water regardless of how full the bottles were (no need to hold upside down and no air consumed when sucking the lid).They were completely collapsible when empty (aside from the hard plastic lid) so I could squash completely into my pockets.I will use these for all long distance runs now. They were exactly what I was looking for and hoping for.