A couple other people asked about that bottle here, but no useful information was given:
Glass Monkey...that's interesting about a possible Chicago connection. I have dug these off and on here over the years...mostly in a local town dump...Makes it appear they were distributed locally, perhaps ??
It says 67 on the bottom of the bottle of the Zetz Bottle. I Live about 90 miles from New Orleans, LA. It must be from New Orleans or Baton Rouge because they used to have a company back then in them...