1 cup sugar
2 cups raspberries
1 cup fresh lime juice
250 ml gin
800 ml Seltzer
In a medium pot over high heat, bring sugar and 1/2 cup water to a boil, stirring until sugar dissolves. Set aside to cool, about 10 minutes
Meanwhile, muddle 2 raspberries in the bottom of each glass. Add 2 tablespoons reserved simple syrup, and 3 tablespoons gin to each glass.
Fill each with 1 cup ice and top with 1/2 cup seltzer. Garnish with lime slices and more raspberries.