In a small saucepan, bring berries, sugar and ¾ cup water to a boil over medium-high heat. Continue to boil until the sugar dissolves, stirring occasionally.

Reduce heat and simmer until the berries begin to fall apart.

Remove from heat and strain, pushing all of the liquid out of the berries with a spatula. Refrigerate the liquid and discard solids.

Once the syrup has cooled stir together the syrup, water and lemon juice in a 2-qt pitcher. Refrigerate.

Serve over ice with lemon slices.