Shipping containers make ideal construction materials because they are environmentally, as well as structurally sound, said Paul Galvin, CEO of SG Blocks. SG Blocks is currently building a 21-unit development in Nashville, Tennessee called oneC1TY. Galvin said oneC1TY is a multi-building, mindful living community that caters to the healthcare, life sciences and technology sectors. He said SG Blocks structures in Nashville will house commercial properties including retail stores and restaurants. Retailers in the past that have utilized Galvin's sustainable, container-based structures include Starbucks, Puma and Equinox.