This is a great deal! A set of 6 for 3000 yen including shipping, when the going rate is 2000 yen for 2! That's only 500 yen each! These are "Keepo" tumblers, which utilize a double-walled, vacuum-insulated structure, similar to a thermos. They are made of porcelain and have a double-walled structure to keep drinks cold or hot for a long time. They are also lightweight and easy to use. When warming drinks, you can put them directly in the microwave, so you don't need to use a separate container. They are also dishwasher safe. These combine the best features of double-walled stainless steel products and porcelain! Key Features: ・Keeps drinks cold or hot. ・Double-walled, vacuum-insulated structure. ・Microwave and dishwasher safe! ・Approximately C7.5 (C4.8) x H11cm (approx. 330ml) Since there is no box, they will be packaged in a commercially available cardboard box. Thank you for your interest!