Soft Flask - Shrink As You Drink Soft Water Bottle for Hydration Pack - Folding Water Bottle Ideal for Running, Hiking, Cycling, Climbing & Rigorous Activity

When I first got into running long distance a few years ago I tried so many iterations of bottles - this by far is my favorite! It’s a solid design, holds just the right amount of water for me and fits in my run vest so I can be hands free, plus it doesn’t break the bank. I’ve also weirdly enough put warmer water in it for winter running! They last a long time - the spout makes the water easy to access and if I don’t bring my vest it’s light and hand sized, making it easy to carry. All in all great functionality. Also their customer service is super friendly and knowledgeable! Rare to have a person on the line AND one who’s friendly.

This handheld soft flask is great and easy to carry with me on my runs. Easy to use. Has a slight plastic taste at first but I’ve soaked it in hot soapy water and that has helped. The little pocket on the hand held “carrier” works well to hold my keys and a small snack. Wished I’d found it sooner! Good quality. Easy to use and carry!

The size and function of this is just right. But, as others have said, there is a taste/smell that I can't seem to eliminate. I tried vinegar and baking soda, and then tried extended soaks with the same. I managed to decrease the taste and smell somewhat. The flask is so portable and well-designed that I just use it and try to overlook the taste.

The Soft Flask is perfect for running—lightweight, easy to carry, and shrinks as you drink, so there’s no sloshing. It fits well in my hydration pack and packs away small when empty. Great choice for staying hydrated on the go!

It is only a couple of sips of water at 5 oz, but for an exercise walk in the heat, it will do. It's small enough to fit in a pocket. Before I used it, I put in a wash of baking soda, and now the water is fine---no taste of plastic at all. It does not leak.

Expert skier who previously used water bladders with tube fed through the backpack for hydration while skiing. On cold days, the tube would freeze to my dismay. Nothing I could do to fix this issue worked. I tried insulated tubing without success. I then started carrying a 500 mL bottle of water each day in my thigh bib pocket which worked in terms of not freezing, although I found the shape of the bottle uncomfortable. I ordered this soft flask at the 400 mL size as I thought it would fit in my pocket and yes, it does. I fill it when I go in for a brief break and it is fine for resort use. Would this work for backcountry? Well, personally 400 mL isn't enough water for me for more than a few hours so I think this will have to stay for resort use. But for what I need, it works perfectly. The reason I gave it 3 rather than 5 stars is the taste of the water... despite filling it initially with hot, soapy water to clean, I still taste would I would best describe as the inside rubber/plastic taste/smell of a pool toy. If you have ever blown up a pool toy, you know what I mean. With time it has been getting better but the taste remains. On the product it is clearly advertised that the product is safe for use with claims of product safety by FDA, but who knows...

These are perfect to carry water in a purse or running waist pack. They weigh next to nothing and carry 8oz of liquid. Perfect for cupless races when we are expected to carry our own refillable cup. Much easier to grip & the cap means you don’t have to drink it all at one time.

When I first purchased this pouch it was great. Somehow a tiny sliver of a hole popped up and leaked everywhere, therefore I ordered a new one thinking it had to have just been a fluke. My second one after a week of having it, same issue. I hand wash them and am gentle with them so not sure how they keep getting a small puncture. The second one however leaked enough in my running belt to cause water damage to my phone so my $11 purchase for one of these turned into a $520 purchase of paying off my water damaged phone before I could get a new one lol. They work great when they don’t leak water and get punctured but I guess are made of very fragile material for that to happen to 2 of them that went on maybe 5 total runs with me each.