Happy Days S01 E03 Richie's Cup Runneth Over

"Those were the days of the 1950's...filled with innocence and the promise of even better days to come."

Richie and Potsie are invited to Potsie's cousin's stag party. In an attempt to lessen the effects of the alcohol they will consume, they each drink several cartons of milk and a sip of olive oil.