Nathan Replacement Flasks with 10-Ounce Push-Pull Caps, Silver

These water bottles worked as a replacement for two Nathan water bottles I had purchased with a belt several years ago. The old Nathan bottle tops had begun to leak when I ran, so I needed a replacement to keep my butt dry while running. These work perfectly, at least so far. They fit my older model Nathan belt perfectly and I like the extra ounces they offer over many other water bottles from different brands. In addition, these newer Nathan water bottles have a softer top instead of a hard plastic one, which makes drinking from them while on the run more pleasant as they don't jar against your teeth or gums. I've noticed many reviewers have indicated having problems with springing leaks with these bottles along the seems, so I'll hold off on the fifth star until I've been using them for more than two weeks. So far, these have been a great replacement!UPDATE: I've had these and have been using them regularly since July of 2016 (almost 1 year) without any problems. No leaks, the tops are still in great shape and they have held up perfectly. Highly recommend these flasks!

Bought these because I loke the tops better than the ones that came with my fuel belt. Great product, happy with my purchase.

I have tried several different brands of bottles for my running/walking workouts in the hot Arizona summer. Nothing has compared to the quality of these. They are easy to drink out of, unlike others that push back down as you're trying to drink out of them. The opening of the bottle is wide enough to put ice cubes in, also making it easy to clean. I know these are going to last a long time. To top it all off, they are priced very reasonably. I highly recommend them.

These were a replacement for the original flasks that came with my Nathan fuel belt. Sadly one of them sprung a leak right before a race. The caps can be a little fussy. If you don't get them on just right they will leak. I do like that the opening if fairly good sized and easy to drink from. Happy that replacement flasks are available since I like the fuel belt and are curved to fit comfortable around your hips. I gave them 4 stars instead of five since the cap requires a little attention to get it on right and for the fact that my original flask developed a pin-hole sized leak for no apparent reason.

I am a trail runner and major advocate of carrying water with me on my runs. I have a Nathan running belt and lost one of my water bottles. These are the exact ones that came with the belt originally. They are great water bottles that do not leak like others I have used. Good deal as I thought I was going to have buy a whole new running belt. Good quality product. Thanks!

I got these to replace the 8 oz one-way valve bottles that came with an older version of a Nathan belt. Those bottles kept leaking when running, especially if I used any Nuun that fizzes. These don't do that at all; no leaks, no spraying, and stay closed until you need them. They also fit the same "grenade-style" holders on the older Nathan belts, actually much more snugly which I like. For $10, you can't beat them!

I compete in ultra trail races which requires a solid fueling strategy. One of the aspects of mine is a Super Starch, Electrolyte and MCT Oil blend which can be particularly messy if not in the proper container. These flasks are easy to mix in, drink from, they're durable, lightweight and never leak..even with all the jarring around that happens while you are running down a mountain. After they passed the test of trail running I decided to bring them along on a long grueling backpacking trip in the Adirondacks where they proved to be very useful. I liked them so much I purchased two more.

I’m a fan of Nathan products, I have many. I bought two of these water bottles for long runs. Buy the time I go to pull out a bottle to take a drink of water, half the water I gone. Oh, it’s not gone, it has soaked the front side of my running vest because it has leaked. Not sure if there is supposed to be an o-ring to help seal them better, if so, these bottles are missing it, if not, may I suggest adding one to the design.