I saw that thread, but it was hard to make out the coffin shape unless seen from above. This one, loosely based on Mikeschn's Weekender, would be more functional and the coffin shape is more obvious when placed on its side.
It's definitely meant to give a feeling of claustrophobia! I almost put a skylight on it, but decided that it probably wouldn't appeal to the undead demographic. The interior could be red satin button-tufted upholstery.
