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2L Replacement Bladder

4.315789473684211 out of 5 stars
57 Reviews
Color:One Color



Nathan Replacement Bladder

When you start to feel tipsy from whatever has been fermenting in your old hydration bladder, then it might be time to pick up the Nathan Replacement Bladder. The BPA-free 2-liter bladder fits seamlessly in your Nathan Race Vest and has a high-flow bite valve, so you don't feel like you're sucking on a golf ball when you go to get a drink. 

BPA-free plastic
68 oz
high-flow bite

Overall Rating

4.5 based on 57 ratings

Review Summary

1 Stars - 4 reviews
2 Stars - 2 reviews
3 Stars - 3 reviews
4 Stars - 11 reviews
5 Stars - 37 reviews

What do you think about this product?


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5 out of 5 stars

November 11, 2023


[This review was collected as part of a promotion.] The two liter hydration container is BLADDERRIFIC! This is more than enough for your ten plus mile running days and a great companion on your half or full marathon journey. Take this on longer walks or hikes as well. Attach this to one of the many wonderful Nathan hydration packs or vests available, and you are set for an excellent hands free experience!

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Originally reviewed on

4 out of 5 stars

October 4, 2023


I bought this as a replacement for the original one that came with the Vaporairess Lite I purchased. The original one started leaking from the mouth piece and would squirt a little bit of water every time I stepped down. I would not have minded if it was enough water to cool me off while running, but that wasn’t the case. To be fair, I believe it could have been my fault the original one started leaking. I may have bitten down too hard on it. The replacement one has been working fine for several weeks now. It’d be nice if Nathan sold the mouthpieces instead of having to buy the whole bladder tho.


Originally reviewed on

3 out of 5 stars

September 25, 2023

Poorly designed mouthpiece

Had an old Nathan vest with bladder that lasted for six+ years with no issues...finally decided to upgrade and have used the new 2 liter bladder for two months and it leaks incessantly. Realized I had punctured the mouthpiece, assuming with my teeth, and now have to replace the entire bladder. Would be great if you could sell replacement mounthpieces, or make them more durable. We'll see how long this one lasts.


Originally reviewed on

2 out of 5 stars

September 19, 2023

Replacement Bladder

This purchase was to replace an older model bladder. This new design is much harder to remove and replace the slide closure and harder to hold open to refill at aid stations during races. The old design was more user friendly.

Eric S

Originally reviewed on

5 out of 5 stars

August 20, 2023

Basically indestructible

[This review was collected as part of a promotion.] I bought this bladder again because I love my first one so much. My first one didn’t break, I just like to have a backup. I also recently bought an in-line water filter for hiking trips, so I want one bladder dedicated to holding unfiltered water. I’ve had my first one for at least 6 years—basically indestructible!


Originally reviewed on

1 out of 5 stars

July 30, 2023

Excessive leaking

The size of this bladder is ideal and was what I was looking for..unfortunately it just does not deliver. It leaks NON STOP. At first, you don’t notice it because it is a couple of drops as you are moving. But 20 minutes in you are soaked because the mouth piece is dripping all over you. I can really only use this on hot days because being wet isn’t a big deal but once it cools down I won’t be able to use it. Not sure if mine was defective but would not recommend..


Originally reviewed on

5 out of 5 stars

July 10, 2023

Very durable!

[This review was collected as part of a promotion.] Has lasted through 2 x 100 mile races and 100+ hours of training, in all weather conditions, with no leaks.


Originally reviewed on

2 out of 5 stars

June 9, 2023

I’ve got a bad bladder

Had bladder for roughly a month and a half and the bottom has already ripped open.


Originally reviewed on

4 out of 5 stars

May 4, 2023

The whole vest is well made

I bought my first vest in 2017 and is until last year that the mouth piece started leaking and now is really bad. I need a new one but I don't see the piece available by itself.


Originally reviewed on

3 out of 5 stars

April 20, 2023

Nathan 2L Bladder

I really don't like the opening, it just is hard to hold open and fill, especially when you are in the middle of a long run. I'd like to see a screw open feature to fill it up.

Ironman Chris

Originally reviewed on