Forma is a product line with heavy sculptural constructions in solid glass, with roots in the historic Bauhaus era, where forms such as cubes, spheres, and cylinders serve as the primary shapes. Forma holds the same graphic strength in the form of massive geometric shapes that intersect. The strong language of the form works with the negative space around the construction and thus how the brain reads the fusion of the forms. The tumbler measures 3.9 inches and is made of pressed clear glass. The shape is a perfect cylinder with a sturdy base. Here you have a perfect barware set for everything from single whiskeys to the most advanced cocktails. The tumbler is sold in a pack of two. There is also a long drink glass complementing the Forma series.