Lead glass is a heavy glass composition incorporating lead oxide, which increases the refractive index and weight of the vessel. This material allowed makers to fashion sturdier drinking vessels with brilliant clarity. In eighteenth-century production, this heavier metal supported the development of complex baluster stems and detailed wheel engraving without losing structural integrity.

How do air twists differ from opaque twists?

Air twists contain spiral channels of trapped air inside the clear stem, created by drawing bubbles through the molten metal. Opaque twists incorporate solid white enamel rods twisted into distinct threads. Both techniques were mastered by glassmakers to add decorative movement to the stem while keeping the bowl plain or lightly engraved.

What were rummers used for?

Rummers were capacious drinking glasses utilised for ale, wine, or spirits during the late eighteenth and early nineteenth centuries. Their sturdy proportions made them suitable for everyday tavern or domestic use. Many examples feature wheel engraving, commemorating specific sentiments or occasions while retaining a heavy foot and short stem.