Pink Panther Flakes
Post’s Pink Panther Flakes were conceived as a 1972 tie-in with The Pink Panther Show, an animated Saturday morning offering. One popular feature of the cereal was its ability to turn milk instantly pink as soon as it made contact with the flakes.
This could be found on the back of the box: “Have breakfast with the Pink Panther! Pink Panther Flakes are pre-sweetened, pink frosted corn flakes. They’re fun to eat, good tasting and fortified with 8 essential vitamins. Try ’em. You’ll love ’em…”
Source: Pink Panther Flakes