We use an office waste-paper basket (4 gallons, maybe) under the sink. There's just enough room for it to stand up, but we have to tilt it to put stuff into it. We've used grocery store plastic bags as liners, but they're not quite deep enough. We dug out some old plastic bags we got at Costco when we first joined 18 years ago. they're a bit bigger than the can, but work fairly well.
Frank and Eileen
No longer RVers or FR owners