Very nice piece of glass work here. 

stamped Aurora, i believe that is from United Kingdom.

this is a vintage piece and designed to catch bugs.   The center ring is filled with a sweet liquid and is hung from a tree.  A cork is affixed to the top and the bugs fly in and cannot get out.   

Also works inside for fruit flies.

NO cork is included, that will need to be replaced, it stands 5" tall

see pictures, reach out with questions.