Nathan 20oz Soft Flask w/Bite Top, Running Water Bottle, Collapsible Water Bottle, Travel

This is a repurchase as I had to toss my last one during a marathon rather than carry it to the end. I wasn't using my hydration vest, which I do use in training and this flask works great in, especially if you add the long bite tops. In any event, there is absolutely no odd taste or odor from this material and the top does not leak. Also, with the wide top it is easy to refill in a long race at an aid station if you want to. Easy to clean as wel.

I love these bottles. I have a Nathan running vest that I use for long runs. That vest came with a 2L bladder, which is great for hikes, but when on a long run 2L was too much, so I would always partially fill it. Then I tried these, I now almost exclusively use these bottles for run hydration. They work perfectly with the vest, which should come as no surprise since they're designed to work with each other, but my favorite thing about them is the size. As it turns out 14oz is the perfect amount of liquid for most of my longer runs. It also end up being a perfect amount for a post run electrolyte drink after a shorter run, so I end up using them at home too! I had an issue with the original bottle I orderer months later and they company fixed it no questions asked. I can't advocate enough for them!

I actually haven’t tried it yet but I do like the support on one side so you could either carry or put it in your vest pocket.

Perfect for my need

Works great - the spine piece makes it a lot easier to stow and handle than the typical soft flask. Just enough hydration for shorter runs. It fits great in the stretch pocket of an Endorphin running belt.

These are great flasks that twist and lock when needed. I usually store one in the back of my running vest, and I can be confident that it won’t leak bc of the locking system. I prefer these over bladders. I’ve had a set of these that I’ve used for years, and just bought these extra ones a longer event.

Love this bottle for my longer runs. It’s portable and light weight. There’s a thin rectangular plastic backbone that gives the bottle structure. I’ve night cheap silicone bottles and they get flimsy as you drink water and hard to hold. This design is actually pretty genius. I carry my bottle on runs in my run belt and it’s comfortable. I don’t have any issues with smell or taste. The valve works great, even my toddler loves it haha.

Previous versions of the 20oz have an integrated spine to provide support (I have four). The 14oz and 18oz they're selling both have spines (at least the Amazon and Nathan.com photos show spines), only by noticing the absence of a picture of a 20oz with a spine would one imagine it has no spine. The spine is why I overpay for Nathan brand flasks. These bottles are so flimsy and weak that they repeatedly collapsed in on themselves IN the pockets of my Nathan hydration vest. These are of no use to me, that was a waste of $80 (I bought them as spares should my others start to leak - my wife and I both share them).

Love these bottles. Almost zero weight. Easy to use in the gym. Water stays inside! Would give 5 but the silicone material picks up the colour of gateraid products even when mixed 90-10 with water/juice. The bottle appears yellowish. But still totally functional.

丈が短めなのに容量はある。 短いサイズだとトレランザックからも落ちません。 使わないときに圧で押されて中味が出ないようストッパー機能(ボトル蓋と飲み口の間に回すだけで取り扱いしやすい)もあります。 再購入必須の品物です。

コシがしっかりしており、安定感が有ります。 ぺったりとまではいかないですが折りたためるし、水を入れて粉を混ぜるときとかに直立できるので便利です

これはお気に入りです。

サロモンのランニングベストを持っていて、備え付けのものからこちらに変更。 氷も入れられる大きな口に、ボヨンボヨンにならないところがいい！