Automatic Pet Water Bowl

thingiverse

My mom just got a cat and I wanted to make an automatic water bowl for her. The threads fit a regular flimsy water bottle securely. It hooks onto the edge of the bowl and sits below the rim so that when the water level is high, no water leaks from the bottle. When the pet drinks from the bowl, air can get into the upside down bottle which causes water to pour out until the original level in the bowl is achieved. The water bottle must be airtight for this to work. I included both the stl file as well as step files for anyone who wants to edit to fit onto a different bowl. There is the thread I designed to fit onto the water bottle too if you want to completely redesign it.