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Capsule hotel

https://en.wikipedia.org/wiki/Capsule_hotel

in shipping container

http://www.popularmechanics.com/home/how-to/g172/shipping-container-homes-460309/

For sleeping on festivals, on train stations, when you are in trouble. We have got plenty of ideas. Easily cleaned, cheap, energy-passive.

Does anybody have balls and time to do that?