It doesn’t actually snap together, the lid just sits atop the base. I am a little worried the dogs will just knock the lid off, which is the precise reason i purchased a covered litter pan. I do like that a dog couldn’t just stick it’s head into the litter area, there is a ramp that leads into the litter basin. I guess I’ll just rig up a way to keep the top centered on the bottom. I would not purchase this again