Bathroom U-traps re-fill box (2 versions)

thingiverse

Bathroom U-traps prevent foul odors and unhygienic substances like bacteria and viruses from entering living spaces through the drainage system. However, malfunctioning or dried-out U-traps can compromise this critical function. To guarantee they work effectively, regular water additions are essential to maintain proper operation. With that in mind, I created a refill box that allows for easy water replenishment into the drain outlet without dripping onto the floor.