Zafferano Pirolo Set 6 Tumbler Glasses In Borosilicate Glass. The shape of the glass is inspired by the spinning top: a small protruding element on the bottom allows it to rotate on its own axis, and to lean obliquely on the table. The cup is transparent while the characterizing detail is available in six colors: white, transparent, black, amber, blue, green. Handcrafted glass in borosilicate glass resistant to thermal shock. Borosilicate is a light and very resistant artistic glass, also suitable for everyday use. The Zafferano collections are mouth-blown and hand-crafted by workers who still work as they once did. These glasses are the ideal complement to decorate the table with elements of suggestive aesthetic impact. Each glass has a capacity of 260 ml. They will be sent to you in their box signed Zafferano.