Tera 350ml HOT Stainless Plain Lazy Self Stirring Mug Auto Mixing Tea Coffee Cup Yellow Office Home Gift Novelty with Tera Dust Cloth Just press the button on the handle to do self mixing, easy and convenient. Mute mixing impeller and sealed mug cover, no need to worry about liquid splashing. High-quality stainless steel and food grade plastic made, safe and durable. Material: stainless steel/food grade plastic. Battery requires: 2 x AAA battery (NOT included). Dimension: approx. 16 x 8.3 x 6.4cm. Ifthe itemyou received doesn'tcontain the dust cloth with Tera brand ,itisacounterfeitandyoushouldimmediatelyrequestarefundandreportittoAmazon!