This print is for TPU filament. This is a reusable cap for 5 gallon water bottles. It provides a reasonably tight seal that keeps contaminants out of the bottle and prevents most leaks when transporting the bottles. We are able to carry our bottles by their handles, which puts the bottles on their sides, with only very minor evidence of leakage. This design is still a work in progress. Let me know how it works for you and if you have made any improvements.