Firemans Sour is bracing strong cocktail at 1.3 standard drinks. Shaken with 45ml rum bumbu and 30ml lime juice with 10ml sugar syrup as well as 5ml grenadine including 100ml ice and good with afternoon tea. Just add half the ice to shaker then add all ingredients to shaker and shake well. Pour all into glass and fill glass with ice and served in a old fashioned glass cold.