kind of the smallest possable full utility apartment, AKA a coffin hotell room.
has everything. food, beverages, basic medications, toilet facilities, a sort of laundry that eats your clothes and spits out new one as well as supplying fresh bedding suplys. you will need the latter if you use the built in shower facilities. yesh the whole rooms gets drenched, drained then blowdryed :D
everything is waterproof. oh and this is a self contained life suport unit aswell. everything is recycled except oxygen the tanks will eventualy run out in a few weeks unless refilled, but CO2 is scrubbed. the compartment is airtight and insulated from exposure to open space and cosmic radiation. various food aditives will have to be refilled too, you can ony recycle so much from your own excrea.
and of course it has a computer/entertainment center.
nope you cant stand in it either :D