Saft (Fruit Syrup)

Name: Saft (Fruit Syrup)
Cuisine: Sweden
Ingredients: 2 pounds of berries, such as black or red currants, cherries, raspberries, strawberries, or other berries; 1 to 2 cups of water; 1 to 2 cups of granulated sugar; 5 grams of sodium benzoate to preserve the saft