Make simple syrup: Put 1 cup sugar in a 32-ounce (4-cup) resealable jar; fill with hot water. Seal and shake until the sugar dissolves. Let cool completely. For each drink: Fill a cocktail shaker two-thirds full with ice. Add 1/4 cup fresh lemon juice (about 2 lemons) and 1/2 cup each of the simple syrup and water. Shake well. Strain into ice-filled glasses.
Recipe courtesy of Austin City Lemons for Food Network Magazine