For coffee addicts and workaholics: this is definitely what you need. This fantastic pack includes a takeaway mug with a silicone cap and a great USB heater for mugs. Of course, you can customise both products. Add the picture of your choice on the mug and the text of your choice on the heater. Measurements of the mug: Weight: 15cm. Width: 9 cm. diameter at the top and 5.5 cm. diameter at the base. Measurements of the heater: Valid for cups with up to 7.4 cm. inside diameter. Important: You cannot boil water with this heater; it only maintains your mug warm.