Select a sturdy cup with the superior insulation; versatility; and leak resistance of foam. Vio? cups have been shown to biodegrade 84.3% after 1154 days under conditions that simulate a wetter; biologically active landfill; using the ASTM D5511-11 test. Note that stated rate and extent of degradation do not mean the product will continue to decompose. An excellent choice for both hot and cold beverages sip coffee; hot chocolate or soda from these cheerful white-and-green cups.