Lightweight, durable, and compact, the GSI Infinity Stacking Cups are perfect for the trail. . Infinity Clear Propylene is completely recyclable and chemically inert. Non- leaching, does not contain BPA. High melting temperature. Excellent clarity. Extremely lightweight, 25% lighter than traditional Polycarbonate. High impact resistance. Dishwasher safe 90497752223 19834800012 75222