Thicker gauge metal can make for sturdier building and provides a heaviness to the cocktail shaker. Although quite a few Boston shakers are created of tin for more secure shakes, the glass rim on this Kotai shaker is tempered—the rim is heated up and cooled down for long lasting glass https://titusgdkcg.snack-blog.com/37679842/the-ultimate-guide-to-shaker-cabinets