I see you can lock yourself in a onesie...
Let's have you first drink a litre of water, put a karada on yourself and lock yourselff in the onesie. Then take the block of ice out after half an hour, letting it thaw on its own.
EDIT: I can lock myself in pants with my belt (modded to be lockable) or anything else including the belt. I also have lockable high heels
