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 will find that they provide a cleaner,leak-free casting.The Boston Shaker is designed to be durable and suitable for high volume bars,but is suitable for any family bartender.Made of food grade stainless steel,safe and non-polluting,will not rust or drip.Manually select the perfect waterproof seal.The kit has been carefully designed,hand-selected and tested to ensure a perfect seal every time.Elegant Gifts:The Boston Cocktail Bartender is both attractive and elegant,a perfect birthday or Christmas gift 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 experienceColor:silverMaterial:Stainless steelSize:23*10*10cmPackage Contents:2* stainless steel cup1* mixing spoon1* crimping measuring cup1* filterOnly the above package content, other products are not included.Note: Light 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.