Put lots of ice and all of the ingredients except the grenadine/Blue Curaçao into a shaker.
Shake for about 20 seconds to chill the liquid really well, then strain the mix into the glass over ice (you could fill your glass with ice and pour the mix straight in, or - to look flash - strain it over ice separately and then add to a glass containing fresh ice).
Pour a little of the grenadine/Blue Curaçao over the drink so it floats on top - gently does it!
Serve with a on orange slice and a cherry or two.
Sweet and sour mix is half lime and/or lemon juice, and half simple syrup shaken together over ice.