Color Changing Coffee Mug With a Hidden Heart Reveal

No. The glaze reacts to heat, so cold drinks will not bring up the hidden design. Fill the mug with hot coffee, tea or milk and the message appears within a few seconds.

Wash it gently with a soft sponge and mild soap, and skip abrasive pads and harsh cleaners. Those are the things that dull the glaze and print. Treated that way, the print stays crisp and the reveal stays clear.

The reveal is the point, but this is also a solid everyday cup with a glossy ceramic body and a sturdy handle. Spread the cost over the mornings you actually use it. A mug you pour from every day gets far more use than a card that is read once and forgotten.

Yes. It suits Valentine's Day, anniversaries and birthdays, and it works for a parent or friend who enjoys playful drinkware. The reveal happens in front of the person you give it to, so the surprise lands with the gift.

A printed mug shows the same design every time you look at it. This one hides its message until hot liquid touches the glaze, so each pour becomes a small reveal rather than a picture you have already seen.