The sweet and tart combination will garner rave reviews. Add sugar to taste, and serve over ice.
In a small bowl, with a potato masher or spoon, mash 1 cup rinsed fresh raspberries (6 oz.) with 2/3 cup sugar.
Let stand 10 minutes. Press through a fine strainer into a pitcher (at least 1 1/2 qt.); discard seeds.
Stir in 1 cup lemon juice and 2 cups water. Taste and add more sugar if desired.
Pour into tall, ice-filled glasses.