It’s a bathroom where the shower and toilet are together in the same space without any separation. It’s also known as a wet bath.
When it’s time to shower, close the bathroom door and make sure it locks in place so that all of the water stays inside the wet bath.
Yes, a wet bath gets everything from wall to wall and floor to ceiling wet. Although a strange idea in America, many European hotels actually have wet baths.
The space-saving nature of a shower toilet combo is the number one advantage. Going away for a weekend in a Class B camper van makes it convenient.
Another hassle is constantly having to dry it. If you don’t reduce moisture in your RV, it can lead to problems like mold and mildew. You have to wipe the wet bath dry after using it.