Green House will release a heat insulation device for insert cups, "USB Insert Cup Warmer," in early December. The price is open.
This product is a cup warmer for disposable insert cups that are widely used in offices. If you put an insert cup in the main body, attach a silicon cap, and put it on the stand, it will keep 50 to 60 degrees of drinking.
It is equipped with a safety device that automatically stops heating when it reaches about 65 degrees Celsius, and starts heating again when the temperature drops. It is a USB power supply type that can be placed at the desk, and there are four types of color lineup: "ivory", "red", "blue", and "green".