Review on TRIWONDER Collapsible TPU Soft Flasks For Hydration Pack - Ideal For Running, Hiking, Cycling, And Climbing Sports Water Bottles by Junior Rojas

I am a marathon runner and I use this for training and also on race day. I have tried belts and different type of bottles which none worked for me since I want good form and arm swings during a run. Overall this is a great alternative to holding plastic bottles which my small hands have issues and this provides a good grip while minimizing the interference of my arm swings during a run. Now, this is a sip type of bottle since you have to bite the head for water to come out, so you won't be able to gulp large amount at once and does take a little getting use to. There are two zip pockets, one is for the water container and the other is for car keys, ids, CCs or money. It might be able to fit a small phone but if the container is full of water it will take up most of the space, so I don't think it would have fit my big phone Galaxy S10+, I don't bring phones since I have a Garmin watch for music and tracking.