Fuel Belt 8 oz. Bottles are replacement flasks that hold 8 ounces each and are sold as a 4-pack. Each bottle has non-skid grip ridges marked 1 through 8 ounces which makes calculating your calorie needs a snap. The flasks are made of a soft plastic which is perfect for gels too! The bottle opening is much larger than the original flasks from 1998. The new caps are made of a special EVA material which makes them soft enough to bite down on - always key when you're running at top speed and trying to open the tops! OneTri is one of the premier retailers for the Fuel Belt 8 oz. Bottles, 4-Pack.
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