Mouth blown by master glassblowers, tumblers with exceptionally heavy bases and fine walls. Fine walls and weighty bases accentuate the clean lines of these modern tumblers. Expert craftsmanship is required to make and finish each piece by hand. Mouth-blown glass. Fine walls. Heavy base. Dimensions: Capacity: 250ml, Height: 10.5cm, Width: 8cm. Due to their handmade nature, the size of these items may vary slightly. Style code: BI06. Materials & making: The Boris tumbler is mouth blown by master glassblowers to create the signature thick base. The fine rim is fire polished to create a smooth finish.