The tradition of the Indianapolis 500 winner drinking a bottle of milk in the winner’s circle started in 1936, when Louis Meyer gulped a bottle of buttermilk, which his mother had suggested would be refreshing. Photographs of the drinking made their way to the National Dairy Council, who knew good publicity when they saw it. They have sponsored a bottle of milk for the winner every year since.

We’re not sure if the winner’s milk in the 30s through the 50s came from Polk’s Dairy, but since Polk’s was once the largest dairy in the city, it very well might have.