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.

I don’t like to carry a water bottle when I go on a run. At events and our local track, there are water stops along the course, but I like to have a little water with me so I can hydrate to my thirst. This bottle is absolutely perfect for that need. It fits in my pocket and does not leak and lets me get small boosts of hydration between water stops. It does not hold much, but for me it is perfect for hydration supplementation during a 10k. If this is all the water you have / available, it would not be big enough, but for races where you know there will be water stops offered, this bottle is great. There was a slightly plastic oder when I first got it, but it went away quickly and the water never tasted off.Pros: easy to fill, easy to use while running, great size for extra water, easy to clean, pocket sizedCons: slightly plastic smell (dissipated quickly for me)Bottom line: great way to supplement water on a running course with water already available.

This is perfect for hot summer runs! It fits right in my pocket and holds just enough water. It does have a slight plastic taste at times but it’s to be expected given the material. The color is bright and cute, overall this is a great product for the price

This rules. I am so excited about my new little bottle. I am training for a trail half and plan to pack this little dude as my electrolyte bomb. I used it the other day on a short run and plan on keeping it handy at most times. It “shrinks as you drink” so it will be easy to stash and refill at the next staton without taking up any excess space. Also super lightweight. The sipping mechanism isn’t quite like any other product I’ve used. I am having a hard time describing it without using terms a teenage boy would chuckle at, suffice to say, it’s really functional lol! I am looking forward to following the company and ordering more great products from them!

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...

I used this for the first time on a run yesterday in the 95 degree heat. I would give the flask 6 stars if I could. It’s designed perfectly for runners. It sat unnoticeably in my pocket and did not leak at all. And required minimal effort to take a sip. We’ll see how long it lasts but it may be one of the best gift I have received in the past few years.

Disappointed. I bought this for my daughter to take on her runs. First, it smells weird and the water consequently tastes weird. We tried rinsing with milk several times as recommended. That helped a little.Worse—the top is nearly impossible to get back on under normal circumstances, much less while mid-run. The threads are super difficult to line up. It will take multiple tries. Not surprisingly, my daughter thought she had secured it only to have it fall off. I emailed the company to ask about buying a replacement cap, and they told me I’d need to buy a whole new flask. I’m not going to do that.

I’m very happy with this water bottle. I picked it because it was affordable and had good ratings. I’m pleased to find that it’s watertight, folds well when empty, and is easy to hold while running