Sunday morning I found this bottle at the junkie flea market I go to. Not sure if it`s old or a repro. . You put sugar water inside, it attracts the flies and they go inside and can`t figure their way back out and die. I haven`t tried it yet, but maybe at this weekends 4th of July party. If anyone knows any information about these bottles ,I`d love to hear about them. Even if it`s about the reproductions , so I can learn the difference between the old and new. I have another one somewhere that I found a few years ago, but it was smaller and had a glass stopper lid and a wire to hang it up. That woman said it was old.