The most natural alternative to plastic, PLAnet is derived from nontoxic and renewable resources and made through the process of extracting, fermenting and polymerizing the raw starch material. Not only is this product completely plant-based, but by choosing this product over plastic, environmental impacts are substantially reduced. It will last in your kitchen for years of normal use and will biodegrade, only once buried, within 2-3 years. Raw Materials - Pla Resin (Corn and Cassava) Smooth, glossy or matt finish similar to plastic Great alternative to melamine tableware Includes: Blue, 17 Oz. Tall Cup, set of 4 Available in: White or Blue Key Benefits: Made from Plants! Reusable Dishwasher Safe Microwave Safe Fridge Sage Non toxic, contains no heavy metals or petroleum-based plastic BPA Free Color: Blue.