The Arlo Ceramic Tumbler with Bamboo Lid 11oz features a matte glazed-top outer-wall finish with a contrasting natural baked base. Double-wall ceramic construction helps prevent condensation on the outside of the tumbler. The spill-resistant, screw-on lid is made from bamboo. A FSC certified natural gift box is included. Recommended hand wash only. Please note due to the color of the clay, some mugs may vary in color. use caution with hot liquids. This product is microwave safe, please remove lid before microwaving.