At the Hong Kong & Shenzhen Bi-City Biennale of Urbanism from now until April 23, international practice OMA exhibits ‘Storage’. Storage is a response to compact cities such as Hong Kong, where space is scarce and population is dense. Offering alternative uses for the bunk bed, for example, OMA demonstrates how spaces can serve purposes beyond their designated functions. The bunk bed in Storage is transformed into a lens for observations of the city. OMA’s Storage exhibit is the materialisation of a design methodology within a compact environment, using space efficiently through improvisation.