Bourbon Barrel Foods ages its soy sauce in bourbon barrels. They use the barrels for other products too but soy sauce is the main one. It's very good, although I don't detect any bourbon in it.
Kentucky Gentlemen Cigars is a cigar maker in Kentucky that ages its tobacco in bourbon barrels.
When I lived in Kentucky, I had a half-barrel planter on my porch. Right now the market for bourbon barrels is very strong but it hasn't always been. When they are cheap and plentiful in Kentucky, they show up as furniture, planters, rain barrels, etc.