Funkin Sour Mix Funkin Sour Mix is a blend of the finest Sicilian lemons, Persian limes from Mexico, egg whites and pure cane sugar. No need to add egg white, just shake to create a thick foam and the perfect sour. Using all natural ingredients, our sour mix provides a consistent solution for serving a consistent cocktail with a thick foam every time. Simply add alcohol, shake and strain over ice. Product includes 1 litre carton only.