I have 6 cats in my house and empty a lot of litter pans. The stench of dirty litter can quickly overwhelm my garage from the trash cans, so I've designated one as my dirty litter can. That can has a tight fitting lid, and to keep the can and the garage smelling nice, I buy those little car air freshener trees, and tape one to the inside of the trash can lid, with packing tape, by the string. Makes a world of a difference in the odor that greets me when I open up my garage door!