Here's a great gift idea you could give your loved ones. A color changing mug!The On/Off Mug changes its face's design when the contents inside are hot and then changes back again when it gets cold.
The face design of the on/off mug specifically changes to the "ON text" on white background from an "OFF text" on black background when hot coffee or hot tea is poured inside the cup. As soon as it gets cold, it goes back to being "OFF". A very smart design for a coffee mug.
Now you don't need to feel the cup or drink the coffee to know if the drink is hot or not.
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