Bob McLaughlin was kind enough to bring his family's relic to the show, with photographs of it being used. For all those people who want to know what a mold looked like, here you go. I took a couple of pics of the mold in 2005, but this year Bob added some documentation that was really cool to see.
This is the top half of the mold. It was used "upside down". The glass was gathered on a rod and dripped into the pre-heated mold, then... (click next in the upper right hand corner)