Smart Bottle Hydration Attachment Cap

thingiverse

This is a cap which fits a smart water bottle. It function is to make a bottle usable with a hydration system (a tube can be fed through the top). There is a small hole to allow air to exit the bottle in order to prevent the bottle from collapsing when the water is sucked out. I found it difficult to determine the threading of a smart bottle but I believe it is relatively standard and around 8 threads per inch. I printed this on a Prusa printer with PLA filament and with the 'top' facing down. I used 20% infill and that was plenty. I suspect supports are not necessary for the threads but I still used them.