At Aloft hotel in Cupertino, Calif., a man called room service. In the door but not one man, but a robot. His name is ALO Botlr, has a height of 90 cm and weighs 45 kg. Mainly used for transportation of towels or breakfast. It has a 7-inch screen to interact with the customer while notifying him that he is at the door, hits the room phone. Can also use the lift.