Not quite a can, but a 'pod' which is approx. 10' x 12' and includes; place to hang clothes, work desk & chair, queen sized bed, TV, wash basin, shower & toilet !
The bed is on hydraulics which moves the bed from flat (Luggage hidden underneath) to a sofa shape, allowing more floor space and to use the bed as a sofa.
The bed is a little firm for my liking, but perfectly acceptable. Sound proofing was good, although I had the pod immediately next to the reception/gallery, which meant I could hear everyone as they arrived/departed (Try avoiding number 11).
My flight was delayed 3 hours meaning I already missed 2 hours at the start of my pre-paid period. The receptionist offered to extend my departure time free of charge, which was a nice gesture. I'm sure this would depend on occupancy.
If you need a quiet place to catch some sleep and/or freshen up for a few hours, this is a great option.