Vitamin Water and codeine,
Promethazine and codeine are the active ingredients in lean aka “purple drank”. Sprite is usually mixed in with the Promethazine, but any drink (including Vitamin Water) will work.
This is also similar to 2 other lines off of Relax: “Valium and Caesar Salad” from Michael Jackson" and “Eating Ritalin and Steak” from Middle of the Cake. Each one of these lines mentions a prescription drug and a food item!
To help improve the meaning of these lyrics, visit "Power" by Das Racist (Ft. Danny Brown & Despot) Lyrics and leave a comment on the lyrics box