It's okay, the top doesn't close on its own when the trash can liner is in place.  And the bottom is open, so if your liner fails or has a hole, if anything liquid is in the can, it will leak out on the floor. I placed a half sheet pan in the bottom, just in case. And I try to press down the new liner after emptying the can so the trap top won't get stuck on the liner and not close after use. Functionally, it holds the trash.