No, not a bucket. It's a cassette toilet on our boat. There are different options like a pump out, or compost toilets. Here's a quick YouTube clip to give you an idea.

There's a main "Elsan" at each marina or along the canals where people empty their cassette toilets... I'm not sexist, but it's a job that I think is better suited for males 🤗, so I never robbed my husband of such pleasure.😂 However, I've been told that you can find an odd one that's in a terrible state.

There's a spare one on this boat which is handy, cos we've had close calls while continuously cruising before when we got delayed in getting to Elsans.