The new Fliptop Cocktail Shaker is shaking up the market with a patented Flip-Top mechanism. No more looking for the Top, or the Strainer, because it is all built in! After two years of development, this product of hydraulic engineering and hi-tech sealing materials is ready for the market. And Metrokane included quality in both design and functionality. The Flip-Top is a double wall stainless steel shaker for insulation, and is dishwasher safe for easy cleaning.