pour 1/2 an ounce of vodka , 1/2 an ounce of rum , 1/2 an ounce of tequila , 1/2 an ounce of gin , 1/2 an ounce of blue curacao liqueur , 2 ounces of sweet and sour , and 2 ounces of 7-up into a chilled glass filled with ice cubes .