All our shipping orders are sent in bio-based Green Cell Foam. Green Cell Foam is a unique natural, environmentally friendly packaging material made from corn that dissolves with water. Our coolers are made with 100% all-natural, non-GMO U.S. grown corn, helping to reduce Greenhouse Gases, landfill disposals, reliance on fossil fuels & more. Our product produces 80% less greenhouse gas and uses 70% less energy to produce overall.