It seems that Kellogg's has been promoting this in their cereal products for some time!
I see they started with the Rainbow colors too, many years ago.
They named it right.
If you are old enough to remember, Fruit Loops were the successor to Kellogg’s “OKs” whose advertising character was one “Big Otis”, a muscular, smiling Scotsman who was a bit disturbing.
No, I don’t know what was under his kilt!