Botlr, who has been on staff since 2014 and looks a tiny bit like a rolling trash can, works 24/7 delivering everything from extra towels to snacks and drinks. When a guest calls the front desk, the attendant places the requested item inside of the head of the bellhop on wheels, programs in the room number, and off it goes.
Source: You Rang? I Called Hotel Room Service—And Got A Robot | Fast Company | The Future Of Business