Specialized MoFlo Water Bottle Cap

The MoFlo Water Bottle Cap from Specialized is sold on its own, and that is the entire point of it. Bottle barrels tend to stay in service long after the cap has been dropped on pavement, chewed through, or lost somewhere in a kitchen drawer, and swapping a few dollars of plastic keeps a working bottle in rotation instead of in the recycling bin. This is the updated MoFlo, which carries over the valve mechanism from the previous version and reworks the housing around it.

The visible change is the top. It sits flush with the cap body rather than standing proud, which removes the ledge and the crevices where drink mix residue used to collect. If you ride with carbohydrate mixes or electrolyte tabs, that matters more than it sounds — a cap that rinses clean under the tap is a cap you actually keep using, rather than one that quietly retires to the back of the cupboard. The grip texture on the outside was also reshaped so the cap opens and closes with one hand while you are riding.

Underneath, the poppet valve works on the same principle as before: a soft-touch plug that pulls open with a finger or your teeth and seats back down to a leak-free seal when closed. Effort is light in both directions, which is what you want when you are pulling a bottle out of the cage at speed on a rough road. Worth knowing before you order — the tip profile on this generation is not the flat, pinch-style tip used on older MoFlo caps, so it sits differently in your teeth if that was your habit.... Read More