Does the size of a glass matter? Libbey thinks it does and therefore Libbey extended their distinctive Everest glass range with two new beverage glasses. The new additional glasses have a sleek upscale profile. The distinctive groovy structure on the lower part of the glass gives this glass a trendy loo and good grip. The glasses are designed to stack in a solid way and are strong as the glasses are treated by our exclusive Duratuff® strengthening process.