I would use them to store various inexpensive whisky(ey)s in the freezer to be used for making various Manhattans with various cheap liqueurs or vermouth (not in the freezer... not enough alcohol in them). Two parts ice cold whiskey to one part liqueur or vermouth and a dash of bitters. Pour into a glass filled with ice. Then throw in a maraschino cherry (maybe some juice from the jar).
You should always keep some of your really good sipping whisky(ey)s, gin, and vodka in the freezer; that way, you don't have to weaken it with ice. Also, you could store your cheap gin or vodka in a fancy wine bottle for making various mixed drinks with them.
ETA BTW, just for the record, I had a hobby of collecting one style of matching crystal decanters and silver name tags for all the bar's booze, so all my empty bottles and beer cans go to the recycle center, pretty or not.