I love the 8bitdo Pro 2. No connection issues in either Xinput or DirectInput mode. Battery life is great and it can run on the included battery pack which will charge via USB-C or AAs that will actually extend the battery life.

The issue you’re highlighting is due to the difference between metal and plastic. I have an Orca bottle that has a plastic lid that screws on without any rubber gasket and I end up with shreds of plastic in the bottle.

Plastic rubbing on metal leads to the plastic degrading and metal on metal does not make a good seal, so I think a rubber gasket is your only option.