Agua Fresca (Mexican Fresh Fruit Beverage)

Aguas frescas are fresh fruit drinks that are very popular all over Mexico. These refreshing beverages are typically served from large barrel-shaped glass containers. Some of the more traditional varieties are watermelon, cantaloupe and strawberry.
Makes about 2 1/2 quarts

Ingredients
3 cups Fresh fruit (see notes), chopped coarsely
6-8 cups Water
1/2 to 3/4 cup Sugar
1/4 cup Lime juice (optional)

Method
Add the fruit and 2-3 cups of the water to a blender and puree until smooth. Strain through a sieve into a large pitcher.
Add the rest of water, 1/2 cup of sugar and lime juice if using. Stir well and add more water and sugar as needed. Serve well chilled.

Variations
Agua de Fresa: Use strawberries.
Agua de Jamaica: see Sorrel Punch recipe.
Agua de Melón: Use cantaloupe or any other melon.
Agua de Papaya: Use papaya. The addition of lime juice makes a tastier beverage here.
Agua de Sandía: Use watermelon.
Agua Fresca de Pepino: Use peeled, seeded cucumbers and lime juice. Cut down on the sugar. Very refreshing.
The lime juice is not required, but can add a welcome tartness to some aguas frescas.