Amsterdam artist Bas Srakel made the Bikecamper, a tricycle with an expandable coffin-like sleeping container meant "for homeless people, refugees and urban nomads."
To me it was important that is was multi-functional and practical for all most everybody who is living without a roof above their head. It didn't need to be luxurious but it had to be a device solving their basic needs, both psychical and mentally. So it is a bed that can be locked from the inside so you sleep well and feel fresh the next day. The box has a lot of space to store a lot of stuff but is still small so it is stil light and easy to use. Also extended it is still small and therefore you can sleep anywhere you want, also in the city without being noticed that fast. It provides in a very sober way all the basic needs.