whatever you decide to do with them, when you're done, you could buy a bottle tree for the garden or patio and put the rest on there. they're really popular in south mississippi, and they're really pretty when the light hits the bottles. here's a picture:
(* mine is inside, because i'm still an apartment dweller, but my boyfriend's mom offered to buy me one & i couldn't pass up the opportunity, so i'm saving for when i have a yard. i'm sure you could find a way to craft one by driving metal bars into a wooden stake or something if you can't find one to buy, then just secure in the ground with concrete...?)
sorry the pic is small of the actual tree. this is a pic i took for my mom to show her the apartment; it's the only bottle tree pic i have at the moment. heh.