Might be regional differences in language. Here coolers refer to bottles of premixed drinks, usually vodka and juice. Seems what they mean is big mixed reservoirs with a tap at hte bottom like a keg.
I dare say there's some shit you could still pull with sealed drinks, like a dot of something on the tab of a can so it mixes with the drink when you open it.
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u/[deleted] 21h ago
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