One of my summer jobs long ago was hauling hay. We didn't have any of that newfangled "switchel" stuff - just a 10-gallon trash can with water and (sometimes) ice in the back of the pickup. Of course, the guy running the baler and the older men always managed to have a can of Lone Star in their hand, but I would have been hided within an inch of my life if my folks had caught me drinking beer.
I wouldn't even think about doing work like that any more without at least a gallon of Gatorade on ice within easy reach. I don't think I've ever been so hot in any job I've ever done as I was lugging those bales.
Haying is REAL work! &;-)