In addition to porcelain tableware, Kelly Wearstler created glassware in amber hues that were so widely used in antique and vintage glassware around the world. The unique color progression effect is obtained by using three layers of glass: the amber-colored mass is injected in between two layers of transparent glass. The airy, breezy color contrasts beautifully with the distinctive, thick glass base and the pared-down, straight shape of these tumbler glasses.