Thicker gauge steel will make for sturdier construction and gives a heaviness on the cocktail shaker. Whilst lots of Boston shakers are created of tin for safer shakes, the glass rim on this Kotai shaker is tempered—the rim is heated up and cooled down for durable glass that gained’t crack https://knoxttplo.alltdesign.com/facts-about-shaker-cabinets-revealed-56241635