Many years ago before water bottles were invented, guys in the stamping plant I worked for would would inject vodka into oranges then bring them into the plant for consumption while they worked.
A guy I worked with kept this big Robitussin bottle in his desk, this thing was huge, don't think they make them that big any more, must have been a quart. Well he kept it filled with whiskey, several times a day he would make a fake theatrical cough, look over and wink, and say " I need some Robitussin" and take a big swig. Never got in any trouble for it as far as I know, though everybody, including management, knew what he was doing. I think the general consensus was as long as he got his work done, let him have his secret stash.
President Rutherford B. Hayes (1877-1881) kept an alcohol free White House except for guests who smuggled in rum-filled oranges.
Drinking OJT never appealed to me & is dangerous in a shop setting. Part of the relief of quitting time is going home and pouring an adult beverage, and enjoying it in perfect safety.
I guess eating spiked oranges isn’t noticed much until there’s an accident involving machinery.
That trick worked for Robert Mitchum on movie sets.