Colour changing mugs that stay black until the coffee goes in. Every design here is hidden while the mug is cold and appears as it warms — which means the person opening it has no idea what it says until the first pour.
How a colour-changing mug works
Cold, the mug is black and gives nothing away. Pour something hot in and the coating turns clear over about ten seconds, revealing the design underneath. Let it cool and it disappears again. It is a thermochromic glaze rather than a printed trick, so it does not wear out with use — the reveal on the five hundredth cup is the same as the first.
That reveal is the whole point of the gift. The joke lands while they are holding it, at the moment they most need coffee, which is a better delivery than a slogan sitting there all day.
Choosing one
The sarcastic ones suit a coworker who has earned them. The faith designs suit somebody who starts the morning quietly. There are seasonal designs, nature and wildlife, and a set built for the office — the kind of gift that gets left on a desk rather than taken home.
They photograph badly and give beautifully, which is the opposite of most novelty drinkware.
Care and specifics
- 11 oz ceramic, black when cold, revealing when hot
- Thermochromic coating — the effect does not fade with washing
- Hand wash and microwave-safe contents only; the mug itself is not microwave safe
- Printed to order and shipped free in 2–7 business days
A few favorites folks keep coming back to: 6–7 Parent Support Group Color-Changing Magic Mug for Moms, Bless Your Heart Translation Color Changing Magic Mug, Confidential Section 4.A Magic Mug, and Sassy Gnomebody Talk To Me Before 9AM Magic Mug.