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Decades of experience making precision parts for the automotive industry serve as the foundation for high-quality Birdy shakers. Through 18 months of testing and retesting polishing methods, the ideal smoothness that improves efficiency, yet gently shaves the ice was finally discovered. To a precision of 0.1 microns, skilled craftsmen micro-polish each shaker by hand to achieve an optimally smoothed surface that delivers a myriad of advantages. First, the vertical grain works with the rounded shoulders of the shaker to increase the velocity of the ice for faster chilling and to minimise unnecessary ice damage that can make cocktails taste watery. The increased efficiency inside the shaker means the same amount of energy results in a better blended cocktail, with a greater quantity of tiny air bubbles to improve mouth feel as well. Thanks to Erik’s direction, the weight and thickness of the shaker were upgraded slighty to further increase the speed of the ice. This also improves blending and chill speed, and makes the shaker stronger to withstand the challenging work environment overseas. Finally, to complete the 10-step process, just like a fine gem the final polishing ends with a diamond paste finish.
Unpolished metal contains countless jagged peaks. Birdy craftsmen use a 10-step process to reduce the height of these peaks and their sharpness. Instead of making the inside completely flat, it is polished to an ideal smoothness (to within 0.1 micron) with skill only found in the Japanese auto industry. This ideal finish reduces stress on the ice and help you create cocktails that are thoroughly blended and highly airated.
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