Living space is scarce and expensive, especially in big cities. Sea freight containers offer an inexpensive and resource-conserving alternative. The start-up Containerwerk buys the used cargo containers, insulates them to eliminate thermal bridges using a patented method, and upcycles them into energy-efficient and versatile residential and construction modules. Whether used as an apartment, office, hotel or student residence – the containers can be quickly and flexibly combined and assembled thanks to their low weight. Containerwerk makes affordable and sustainable housing possible in the city – and contributes to social cohesion.