Double Wall Glass Mugs - 250ml
Size: Diameter: 78mm
Caution: There is a vent/hole at the bottom of all hand-made Double Wall Glass Cups, this vent is sealed by silicone sealant.
It is not a defect, and it is a simple way to distinguish Hand-made double wall glass cup and Machine-made double wall glass cup.
This vent/hole is required in hand-made mouth blown glass production.