An aside to Ivo's comment about the "rustbuckets." In the 1960s, Felipe Derflingher in Mexico City had a 20 man operation making drinking glasses, lamps, chandeliers, bottles, etc. using metal cylinders that were pierced, into which bottle glass was blown, and the metal antiqued to look old. Most of the cylindrical caged glass we see in the United States, particularly in green, ambers, and browns, has come up from Mexico.