Birdie Saver

This is a humidifying cap for a badminton shuttle cock tube. It can hold a piece of wet sponge, and set the humidity level inside the tube to 50% to 70% for days, as measured by humidity sensors. Cut a piece of sponge, wet it with water and put it into the holder. Any sponge should work. A soft cleaning sponge might be the best. I printed with P1S, and used PETG-HF, 0.2 mm layer standard, with the first layer temperature set to 240 degree C, and ioning the top surfaces.