Cut the 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon) into rough 1-inch cubes, removing the rind. You should have about 8 cups of cubed 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon). If your 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon) has seeds, pick them out as you go.

Working in batches if needed, add the 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon) cubes to a Blender. Blend on high for 30–45 seconds until completely smooth and liquified.

Set a Sieve over a large Pitcher (Large). Pour the blended 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon) through the strainer, pressing gently with a Wooden Spoon to push the juice through. Discard the small amount of pulp left behind.

Add the 2 cups cold water, 2 tbsp fresh lime juice from about 1–2 limes, and a pinch of 1 pinch salt enhances sweetness to the Pitcher (Large). Stir well to combine.

Taste and adjust sweetness. If your 8 cups seedless watermelon cubed, rind removed (about a 6–7 lb watermelon) is very sweet, you may not need any 2 tbsp granulated sugar at all. If it needs a boost, stir in 2 tbsp granulated sugar 1 tbsp at a time until it reaches your preferred sweetness. Stir until fully dissolved.

Refrigerate until cold, at least 30 minutes, or serve immediately over plenty of ice. Stir well before serving, as the juice can settle.

Pour into tall glasses filled with ice. Garnish with a 2 tbsp fresh lime juice from about 1–2 limes slice and a sprig of fresh 1 bunch fresh mint sprigs, for garnish if desired. Serve immediately.