Dishwasher safe. It has excellent antiskid property. Silicone material making it superbly comfortable to hold. These lightweight, cushy, drink sleeves are the fabulous personal style for each man. Enhanced rigidity on sides allows for better grip and insulation. It is very convenient to use it in our daily life for cups. It can be withstand temperature from the lowest -40 Degree Celsius(-40F) to the highest 230 Degree Celsius(446F). Available Color: Fuchsia, Green, White, Red, Orange, Blue, Yellow, Light Yellow, Purple, Black. Specification: Product Name: Cup Sleeve Material: Silicone Total Size: 8 x 6cm/3.1" x 2.4"(Max.D*H) Fit Cup Upper Dia: 7.6cm/3" Fit Cup Lower Dia: 6.3cm/2.5" Notes: 1.The colors may have difference as the different display, please understand. 2.Please allow 1-2mm error due to manual measurement, please make sure you do not mind before you bid. 3.Cup sleeves only, cups are not included here.