If you have fresh or frozen strawberries, blend them with two tablespoons of water until smooth. Strain the mixture through a fine mesh strainer to remove seeds and pulp. You should have a smooth, bright red liquid. Set it aside. If you are using strawberry syrup, skip this step.

Cut your watermelon into small pieces and remove any seeds. Blend the pieces or press them through a strainer to get the juice. You need about half a cup of watermelon juice per serving. If you have bottled watermelon juice or syrup, pour the needed amount into your mixing cup.

In a large glass or pitcher, mix the strawberry puree or syrup, watermelon juice, lemonade, simple syrup, and cold water. Stir well. Taste the mixture and adjust the sweetness if needed. Add more syrup for sweetness or more water if it is too sweet.

Fill each tall glass with ice to the top. Crushed ice works well and keeps the drink cold. Pour the mixed refresher base slowly over the ice in each glass. The drink should be a bright, deep pink color. If it looks pale, add more strawberry syrup or puree.

Sprinkle 1 tablespoon of freeze-dried strawberries over each drink. They will float on the surface, making the drink look nice. Add a straw and serve immediately while the ice is still fresh and the drink is cold.