Luigi Bormioli Birrateque Craft Beer Glasses Tester (Set of 2), 14.25 oz, Clear Designed and Crafted in Italy Shapes Allow the Beer to Flow Slowly into the Mouth while Maintaining the Foam at an Adequate Level when Drinking Foam Control System at the Base; A Laser Etched Circle Helps Maintain a Stream of bubbles Replenishing the Head and Releasing the Aromas Bowl Shape Curved Specifically for Each Style of Beer Lead Free Crystal Glass; Dishwasher safe 25 Year Guarantee against any chipping on the rim or foot as well as any discoloration due to automatic dishwashing. Glass shape and glass quality influence the color, aroma and the taste of beer. The glass shape must match the Beer Style that is poured into it. The right glass will bring forward the true flavors of the beer. The internal volume of the glass must be greater than that of the beer poured into it in order to create an adequate aromatic chamber (Head Space). Distribute the beer more widely across the mouth Allow the beer to flow slowly into the mouth avoiding any turbulence Avoid the transfer of heat from hand to the beer Maintain the foam at an adequate level when drinking purest raw materials, advanced and friendly melting processes highly innovative production processes, enable the achievement of a glass: extra pure and totally transparent, sparkling, longer lasting, resistant to breakage.