Many times, especially when hurriedly making recipes in bulk, a bartender doesn't need or want a full three-piece cocktail shaker. Instead, to make and pour the drinks as quickly as possible, all they will really use is the base cup portion of the shaker and a separate cocktail strainer. Sometimes, however, in the middle of the rush, the other one or two pieces of the shaker might get lost or damaged in the bustle. With the 15 oz (450ml) 1-Piece Stainless Steel Cocktail Shaker from Magnuson Industries, however, you can provide your bartenders with a separate shaker cup for just those situations and eliminate the hassle and problems that arise from disassembling a multi-piece cocktail shaker. This shaker is made entirely from durable stainless steel.