Bibliophile's summer refersher
1 part pure pineapple juice
1 part Sprite Zero (or regular Sprite or 7up if you prefer it sweeter)
decorations (optional): pineapple ring, paper umbrella, straw
Pour the pineapple juice into a highball glass, add the Sprite and top up with ice. Decorate and add a straw.
For a sunset effect, pour a little bit of Grenadine down the side of the glass after you pour the Sprite and allow it to settle on the bottom before you add the ice.