The FlasKap MADIC is the first-ever alcohol dispensing VESSEL designed to integrate with your double-wall vacuum insulated tumbler and functions as a stand-alone lid. The MADIC comes in two sizes, 6oz reservoir (MADIC 6) and 9oz reservoir (MADIC 9). Remove the button to fill the reservoir.  Press the button to dispense. Each press dispenses 1/2 shot (0.5oz) down into your tumbler. Learn more here about the MADIC.