Use a large pitcher (about 2 quarts) to hold all the ingredients and allow for easy stirring. Pour 3-–4 cups of cold water into the pitcher. Use 3 cups for a sweeter lemonade or 4 cups for a less sweet, more diluted version.
Pour about 1 cup of lemonade mix into the water. Stir well until the mix is fully dissolved.
Pour the entire can (46 oz) of pineapple juice into the pitcher. If you’d prefer a milder pineapple flavor, use ¾ of the can. Stir thoroughly to combine the pineapple juice with the lemonade mix.
Pour 2–3 cans of Sprite into the pitcher for a fizzy touch. Start with 2 cans and taste; if you want more fizz, add a third can. Stir gently to avoid losing too much carbonation.
Fill the pitcher with ice.
For a more vibrant presentation, add slices of fresh lemon and chunks of fresh pineapple.
Pour the Pineapple Lemonade into glasses filled with ice. Garnish each glass with a slice of lemon or pineapple if desired.