This travel tumbler is a great gift for a proud Mom of a U.S. Navy sailor! Tumbler is 18/8 stainless steel inside and out; finished in navy blue on the outside. Holds up to 20 ounces; keeps hot drinks hot and cold ones cold for hours. Clear lid includes silicone sealing ring and a sliding mechanism to easily cover or uncover the drink opening. To care for tumbler, hand wash only and do not use in microwave.