Winner of the prestigious 2018 Red Dot and German Design Awards, the Guise collection by Stefan Diez is crafted of the highest-quality, industrial borosilicate glass from SCHOTT Tubing, the premiere international manufacturer of specialty glass for more than 130 years. Guise’s precision-cut tubes are formed from borosilicate glass, a lightweight, yet heavy-duty material prized for its superior strength and durability. Highly resistant to even extreme levels of sunlight, heat, corrosive chemicals, and impact, borosilicate glass also offers superior protection against erosion and aging.