The new ’chameleon cup’ from Tri-Star Packaging will change colour when filled with a hot drink.

The colour-changing disposable cup is made from single walled cardboard and is available in 8, 12 and 16oz sizes. MD Kevin Curran said: "The change in colour means people really notice whatever’s printed on it, opening up brand-building possibilities for outlets selling hot drinks to go."

Tri-Star said retailers can use the cups to draw attention to special offers, make a logo appear when the drink is poured in, or put games on it. Added Curran: "One idea was to print a game of Sudoko on the cup. When the hot drink is poured into the cup, the numbers disappear and the customer can try to solve the puzzle before they finish the drink."