Simple & effective to use; The Bar Supply Co. Weighted Boston Shaker Set is an indispensable set for beginners & professionals. These tools are a must have for any effective home bar. This product features: - 18 oz. Weighted Boston Shaker - 28 oz. Weighted Boston Shaker (All Bar Supply Co. products are tested & used by professionals daily, both at home & on the job.) Boston Shaker Set - Weighted