First, wash and dry the berries. In a medium saucepan, bring water and fruit to a boil. Lower the heat and bring to a simmer for 15 minutes. Remove from heat.
Use a fine-mesh strainer to remove the solids and strain the hot liquid into a bowl or jar. While still warm, stir in sugar until dissolved. Let cool to room temperature.
Raspberry Martini
In a cocktail shaker filled with ice, combine vodka, triple sec, Chambord, raspberry syrup and lemon juice. Shake well.
Strain into a martini glass and garnish with fresh mint and raspberries on a cocktail pick.
Notes
Store syrup in an airtight container in the fridge for up to two weeks. If it turns cloudy, it's time to toss it.