Make it a double (you already know). The Monti-DOF, (that's Double Old-Fashioned) is a modern take on a traditional staple, ready for both tried and true classic cocktails or modern mixologist creations. Throw in the NIX ice mold for concave, perfectly fitting jumbo ice cubes for balanced chilling. The concave base of the ice, frozen in satin feel silicone, fits seamlessly on top of the peak shaped bottoms of the Monti-DOF. In Sempli's wizarding ways, they've endured that the volume around the ice cube when it’s in the glass and then filled to the top of the ice is an exact measurement of 4oz. Chiiiiiilllll.