For Gardena, California-based IC Green, the dual goal of container architecture is flexible design and sustainability. Their modular pre-fabricated container homes are highly adaptable to the buyer’s needs, and they are environmentally friendly on several levels. Using recycled containers, of course, is the first step in making these homes “green.” But IC Green also includes rainwater collection systems, energy-efficient heating options, plenty of natural light, and other eco-friendly features in their home designs. Additionally, every home is equipped with a living green roof, which contributes to sound and temperature insulation and reduced rainwater runoff. The list of green features from this company just goes on and on, making it one of the most eco-friendly shipping container design firms out there.