The big can manages to somehow suction garbage bags inside of it, making them annoyingly difficult to pull out. My husband was about to insist we return the pair but realized that’d be too expensive. Instead he experimented by drilling a couple of holes in the bottom, and that did the trick. As long as we don’t over-fill the can, we can fairly easily pull out the bags now. The small can was meant to keep my dog from bathroom trash, but the hound can push it open without any trouble.