What are these?

In 1968 while in highschool, I had a 62' Dart that had the foot operated windshield washer pump. I washed the bag out and moved it from the inside wheel well to in front of the radiator. Re-routed the hose to the squirters to under the dash. Filled the bag with a slushy whiskey and coke. Wala! Cruised the back roads in style. My football coach always wondered why my left leg was bigger than my right