Begin by making sure you have everything needed to make the cocktail.
Take your martini glass and put it into the freezer to chill it.
Take some ice and toss it into the cocktails shaker.
Take the gin. Use the jigger to measure out 1 oz of gin. Dump that into the cocktail shaker.
Take the advocaat. Use the jigger to measure out 1 oz of advocaat. Dump that into the cocktail shaker
Take the orange juice. Use the jigger to measure out .75 oz of orange juice. Dump that into the cocktail shaker
Take the triple sec. Use the jigger to measure out .75 oz of triple sec. Dump that into the cocktail shaker
Take the soda water. Use the jigger to measure out 1 oz of soda water. Dump that into the cocktail shaker
Remove the martini glass from the freezer.
Take the cocktail shaker lid and put it on the shaker.
Carefully give your shaker a few good shakes. Don't shake too vigorously, or the soda water will fizz up.
Replace the shaker top with the hawthorne strainer.
Pour the drink from the shaker into the martini glass.