We kept one of those tubular whiskey boxes for mice.
Successive cats Ben, Jerry and Ember would bring mice in through the catflap and release them as dancing partners in the house. Tubular boxes were popular with the mice as they tired of the dance, because cat couldn't get 'em if they ran in.
We managed to stop that with Jerry by setting the catflap to out-only. She learned to get around that by banging the flap till it bounced away from its frame enough to get her nose under it, so she could get in on her own when she wanted, but couldn't manage it with prey.
Must've caught half-a-dozen or more in cardboard tubes and put them out with leftover chips or suchlike, a field or two away.