Keeps my coffee warm, extending my coffee drinking time significantly! I used to waste half of the coffee in my cup because it would get cool, and it didn’t taste good after microwaving it. I was hesitant to buy this because I thought it seemed like a ‘gimmicky’ sort of product, but I am definitely glad I purchased it, it does its job, and is super easy to clean and store.
:Heat insulation film heating temperature is limited, it can only be warm things for their own insulation, if you put the cup is cold water, insulation dish is not it will be hot;
:The USB comfortably plugs into any USB compatible device; including laptops, travel chargers, computers, or outlet adapters.
:Perfectly used at the office, home, dorm, car and travel, where can provide USB port
:In the cold or physiological period and other uncomfortable period, it silently guard, give you warmth.
:Diameter 4.7 inches, for most size of cup/mug. 3 color to choose