Tinto de Verano is a very popular drink in Spain. It's similar to sangria but simpler. Here's the recipe:
1 part red wine
1 part sparkling water
slice of lemon (optional)
This is poured over ice. For a sweeter drink sugar can be added to the sparkling water. Instead of sparling water, a pop such as Sprite and 7-Up can also be used.
This is a very refreshing drink. It's especially popular in summer. Enjoy!