Leak proof Boston shaker set: watertight seal than glasses shakers cups; unlikely to get stuck or leaking. Two-piece construction: large tin 28 oz and small tin 18 ounce for mixing and shaking. Professional: chill faster and perfect to mix classic craft cocktails, beverage and liquor. Boston style double tins are best choice for bartender and mixologist. Basic barware accessories and supplies for bar, home bar and restaurant. Durable: made of food grade stainless steel to last a long lifetime. Solid, never break. Essential tending ware items for tenders preference and good addition to your bar cart equipment. Dishwasher safe: these dual drinking tumblers are super easy to clean after making mixed drinks - mojito margarita lemonade daiquiri Manhattan alcoholic whiskey old fashioned. Nicely weighted than unweighted tins. Fun to use and cool gift idea: gifts for men, dad, boyfriend, husband, anniversary and Fathers day; great for party serving and beginner as well. Silver color.