I am Not a Plastic Cup is an Eco-friendly version of its disposable predecessor. This cup can be used over and over again, saving our landfills from being stuffed with plastics. Feeatures an insulated double walled construction that keeps drinks cold while hands and surfaces stay dry....No sweaty glass. Holds up to 16 oz. Reusable Acrylic Cup with screw-on lid w/ straw. Insulated Double Walled construction keeps drinks cold & hands dry. Can be used over & over again. Holds up to 16 oz. Hand wash only-Do not use in microwave.