<p>Two years in the making, this innovative cocktail shaker went viral when it launched. It features a patent-pending top that measures liquids from 1/4 oz. to 6 oz., eliminating the need for a jigger. The professional-grade stainless-steel shaker has double-wall vacuum insulation to keep drinks chilled and hands comfortable.</p> <ul> <li>Patent-pending top features measurements in ounces and milliliters, eliminating need for jigger.</li> <li>Double-wall vacuum insulation keeps contents cold for up to 24 hours and keeps hands comfortable.</li> <li>Top and lid are specially engineered to prevent leaking and freezing.</li> <li>Features built-in strainer and leakproof silicone gaskets.</li> <li>Crafted of professional-grade stainless steel.</li> </ul>