A Boston shaker like this is the style of a vibrator you usually find behind a high-end craft cocktail bar.They usually provide a better waterproof seal than other shakers and do not freeze when shaken with ice.You find that they provide a cleaner,leak-free casting. The Boston Shaker is designed to be and suitable for high volume bars,but is suitable for any family bartender.Made of food grade stainless steel,safe and non-polluting, not rust or drip.Manually select the waterproof seal.The kit has been carefully designed,hand- and tested to a seal every time. Elegant Gifts:The Boston Cocktail Bartender is both attractive and elegant,a birthday or for those who like to make cocktails or want to learn to make cocktails. Designed for bartenders and serious cocktail lovers.This cocktail shaker set brings a revolutionary cocktail experience Color:silver Material:Stainless steel Size:23 x 10 x 10cm Package Contents: 6 x stainless steel cup 3 x mixing spoon 3 x crimping measuring cup 3 x filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.