Blue Lagoon with Whistle Swizzle Stick
1 shot Gin
1 shot Vodka
1 shot Blue Curacao
1 shot fresh lime juice
1 shot simple syrup
Mix in tall glass filled with ice. Very good for a blue drink, though still a little sweet for my taste.
From Diffords Guide Volume 5
And, when your glasss is empty blow the whistle to get your bartenders attention.