If someone mentions a 'sleeping box' to you, you may think that they're talking about a micro hotel which you might stay in for a single night. Maybe somewhere near a railway station or perhaps an airport in another country. But in Chiang Mai we have a new type of sleeping box. This came from the simple idea of beating an architectural challenge, in this case taking a collection of ordinary shipping containers with all their good and bad qualities and converting them into something beautiful and, at the same time, cozy and comfortable. The result is Sleep Box: 14 containers of different sizes occupying a triangular area of 800 square meters in central Chiang Mai which together have been transformed into a chic, 21-room, budget- and design-conscious hotel. Each room has its own unique style but by exploiting the fact that our shipping containers share some of the qualities of refrigerators and by using PU foam to fully insulate against the heat of Thailand, guests can also be assured that every room at Sleep Box not only stays at a stable, comfortable temperature but is also energy efficient and environmentally friendly.