Nathan 10-Ounce Nutrition Flask (3 Pack)

The bottles that come in the Nathan Speed 4R Water Belt are 8 oz, but these 10 oz bottles will fit in the holders, but it''s tight. They don''t come out nearly as easily, but you can put them in and take them out with two hands, while running. You should know that after I discovered how tight they fit and that you have to use two hands to really push them in, I decided to stick with my 8 oz bottles. It''d be nice if they could make them just a tad taller to keep the width down. Either that or design the water belts a bit better to account for this. But again, if you really need them in the belt, they''ll fit.

If you''re not familar with the quality of Nathan products, it''s pretty good stuff, or at least, better than any other option I''ve used. Their bottles aren''t 100% water tight, but can come close. If you lay them down on the floor mats of a car and you have some gel or sports drink in them, it''s possible that you might stain your carpet a bit. If you''re not paying close attention when putting the tops on, you can think you''ve screwed it on tight, only to discover during your run when water is dripping down your leg that you cross threaded it. Cross threading them is a really, really easy thing to do.

I''ve been freezing these bottles (without the tops on) and have had no problems at all. Oh yeah, the tops are also the same size as the tops on the 8 oz bottles, so you can mix and match those if you need. One downside though is that these 10 oz bottles DO NOT come with 3 gel tops. Since Nathan doesn''t sell the gel tops seperately, if you want the gel tops, then you need to buy a 3-pack of the 8 oz race bottles. Seriously???

If you don''t know, the Nathan water belts that use this type of water bottle only come in a 2 or 4 bottle option. For Nathan to sell the 10 oz "upgrade" bottles in ONLY a 3-pack, well, that''s a sleezy marketing tactic. Nobody needs 6 of these bottles, but yet, for those that want 4 of them, you have no other choice. Jerks.

Love Nathan''s belt for long runs, as it secures nicely and has adequate storage. The water bottles do tend to leak out of the spout over time, requiring they be replaced. Also, cleaning the bottles and spout system is a bit of a chore. Overall, I prefer Nathan''s system to others, but water bottles could be improved.

I was unable to locate just the replacement water bottles at any sporting goods stores or speciality running stores in my area. I didn''t want to replace whole belt, hence my reason for purchasing on-line. I was disappointed to see the replacement bottles at a recent expo for a local race. I wish I would have waited, and saved the money for shipping and handling.

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I have used the belt only twice and while its comfortable, on the 2nd run one of the bottles came loose and fell on the ground, which broke the top of the bottle so I lost all the water. I would have expected the bottles to be more durable than this.

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I ordered these to go in my Fuel Belt, because the Fuel Belt bottles smelled so badly/strongly of plastic, that I couldn''t see drinking out of them. But, the Nathan bottles are wonderful!! Easy to use, no plastic smell, and fit great in the 2-bottle Fuel Belt for long runs!

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Purchased these after dropping one during my HM race. Same thing as before just another great product from Nathan. Good job Nathan.