This one is pretty hilarious. I would 100% assume you're buying booze for people you are way too young to be hanging out with.
I buy a 6 pack of smirnoff ice once per year. My buddy loves golfing on his birthday and I hide ices throughout his bag, cart, and course because even in our mid 30s it's funny to see someone chug an ice while on one knee.
I've never seen it myself, but my wife spent most of her childhood/teenage years in Shetland, and apparently up there, back then, Smirnoff ice was the drink of choice for hard working middle aged men. We're talking about a bunch of islands where the main employment is offshore fishing and the oil & gas industry, and where they're very proud of their Viking heritage. (Image search Jarl squad to see what I mean, those guys who are picked for the squad will grow their beards all year to look the part)