If they have caps or corks you could fill them with all sorts of things from M&Ms to popping corn. just tie a bow with a small card explaining how to pop the corn in the microwave or even mix candies, pretzels and peanuts and make it "bar snax". i have given macaroni in wine bottles with seasonings tied on and have even put soup mix, dried veggies and noodles with seasonings in a bottle.
have fun
have fun
