Running Vest Soft Flask, BPA-Free 500ml Collapsible Water Bottle for Hydration Backpack, Folding Running Water Bottle for Marathon Hiking Cycling Climbing (White, 500 ML)

I used these Zelvot soft flasks with my running vest during my first ever half marathon, and they worked really well both in training and on race day. The flasks fit easily into my vest pockets and stayed in place without slipping out. They were comfortable to run with and did not cause any bouncing or rubbing. I liked that they compress as you drink, which helped prevent sloshing and made them feel less bulky over the course of the run. They were easy to fill and drink from while moving, and I didn’t have any issues with leaking. Having reliable hydration made a big difference for me, especially since this was my first time running that distance and I wanted something I could trust. One neutral note is that they do need to be rinsed well after use, especially if you use anything other than water, but that’s expected with soft flasks. Overall, these were a great addition to my running setup. If you already have a running vest and need dependable soft flasks for long runs or races, these are a solid choice.

Best water bottle however it does not leak at all. It works amazing. I put it in my best or in my running back never leaked very durable. Very happy with my purchase.

I have this flash in blue and orange, and orange feels more flimsy than the blue. It works well, hasn’t leaked so far - but feels cheaper than the one that came with the vest I purchased .

Bought their hydration vest that with came with a soft flask. Wanted a 2nd soft flask and a different color instead of the one it came with. I like the white because you can also see the liquid inside. Happy with both! Slight "plastic" taste when drinking but I think it's more so from the new mouth piece and will eventually subside. The product itself does not smell and does not leak. Super easy to open and fill with your drink of choice.

Easy to carry and light! Great water bottle while running!

I wasn't sure if this would fit in my new hydration, but decided to try; I bought 2 of them, and decided to fill them half way just to get used to the additional weight. So glad I did, the hike started out at 7.5 miles but due to getting lost ended up 10 miles; so glad I had the extra water.

Looks like cheap plastic. Returned

The design is good & lightweight. Fits easily in a running vest. It hold enough water for a 5k, but for a 10k I would get something larger. Not the easiest to clean because it is not dishwasher safe.