SKATER Sanrio Antibacterial Dishwasher-safe Noiseless Chopstick Box Set, Watercolor Cosmetics, 1 piece, 40g SIAA antibacterial processing. Ag+ silver ions for antibacterial specifications. Inhibits bacterial growth. Cushion holds chopsticks firmly in place, no clattering sound from shaking upand down and side to side. Weight : 40 (case 28, chopsticks 12)g Dimensions Case : 190mm (W) x 31mm (H) x 13mm (D) Chopsticks : 180mm Dishwasher safe : Yes Microwavable : Not available