A design and construction firm called Bamboo Groove builds homes from insulated shipping containers and bamboo. This design gives Intermodel Steel Building Units (ISBUs) a second life. These container houses are built to insulate from the heat and provide natural ventilation for cooling. Guadua bamboo, one of the fastest growing bamboos, is harvested locally in Costa Rica and used to complete the roof and other elements of the home. Other sustainable features of these designs include rain water harvesting, highest thermal insulating capacity, re-use of greywater, and solar heating for hot water and radial floor heating. And because the building materials are reused and sustainable, the building costs are reduced.