Concept 2 BikeErg Water Bottle Holder

thingiverse

This is a water bottle holder for a Concept2 BikeErg. No fasteners are required and it just clips on to the handlebar slide. I printed the bracket in the upside-down vertical position to make sure that the notch is as accurate as possible to fit with the cup holder notch. That required more support than other orientations, but I felt the accuracy was more important for a tight fit. You can try printing it on its side to minimize supports, but it may require some light sanding when mating the two parts.