TLDR summary: Its a wheeled robot doing the job of a dumbwaiter.
(A dumbwaiter is a tiny smaller than person sized elevator in a room which reaches down into a kitchen/office area. Bigger than the pneumatic tubes that move cash at legacy brick and mortar physical stores and bank branches. I don't think they're terribly popular anymore and are best seen in black and white movies. I have the carpentry skills to build one into my house for the sheet WTFness of the artifact, but not the motivation to research any fire related building codes or just simple motivation at all.)
(A dumbwaiter is a tiny smaller than person sized elevator in a room which reaches down into a kitchen/office area. Bigger than the pneumatic tubes that move cash at legacy brick and mortar physical stores and bank branches. I don't think they're terribly popular anymore and are best seen in black and white movies. I have the carpentry skills to build one into my house for the sheet WTFness of the artifact, but not the motivation to research any fire related building codes or just simple motivation at all.)