I actually kind of like that idea. My shower at home has a soap and shampoo station with three refillable units and I hate it. When I redo the bathroom, that goes. However last hotel I was in had a sleek modern rack, with a piece that attaches to the bottle, so it looks like the bottles are on the wall. Since I don’t have enough space for bottles anyway, that would be a step up

They’re nice, but it sucks when you’re in the shower and find out one of them is empty! The people making up the rooms aren’t always great at checking them.