Why does the Indy 500 winner drink milk?

Simply, it’s tradition. And the Indy 500 is all about tradition.

After taking the checkered flag at Indianapolis Motor Speedway in one of the biggest motor sports races in the world, the winning driver is draped with a giant flowered wreath and handed a bottle of ice-cold milk. The winner typically takes a couple sips, poses for a few quick photos and then proceeds to dump the rest of the bottle on their head — sometimes pouring milk on others nearby.

Three-time Indianapolis 500 winner Louis Meyer regularly drank buttermilk to refresh himself on a hot day and happened to drink some in Victory Lane as a matter of habit after winning the 1936 race. An executive with what was then the Milk Foundation was so elated when he saw the moment captured in a photograph in the sports section of his newspaper the following morning that he vowed to make sure it would be repeated in coming years. There was a period between 1947-55 when milk was apparently no longer offered, but the practice was revived in 1956 and has been a tradition ever since.