Dip mold
Glass Dictionary

A cylindrical or truncated conical one-piece mold with a patterned interior. The mold is open at the top so that a parison can be dipped into it and then inflated. It is also known as an optic mold.
Alternate Spellings:
Dip molds
optic-mold
optic molds
Term Variations:
Optic mold