Why do winners of the indianapolis 500 pour milk on themselves?

Question

Why do winners of the indianapolis 500 pour milk on themselves?

Answer 1

the winner who drinks milk in the winners circle gets a nice little stipend check from the milk sponsors ,also its a tradition like the mvp of the super bowl winning team saying i'm going to disney world .there is money to be made following these traditions

Answer 2

A long-standing tradition of the Indianapolis 500 is for the victor to drink a bottle of milk immediately after the race. This practice first began in 1936 after Victor Louis Meyer asked for a glass of buttermilk, something his mother had encouraged him to drink on hot days. Afterward it became a ritual as milk companies became sponsors of the race purse and handed a bottle of milk to the winner to promote their product.