If your cat is like mine and doesn't over eat, this is the perfect way to feed your cat. Also great for when you go on short holidays! Put the food in the top, put the lid on to keep it fresh. As your cats eats the food more comes out into the bowl, thanks to gravity!Print the Body, Lid and the Bowl if you need it. I made it to fit my existing bowl which has a diameter of 152mm at the base. It's prints on a 200200200mm tall printer.