I am looking for a recipe for a good mixture for beginning chemistry students to separate by distillation. I have tried water/ethanol mixtures, but there is not a clear definition between the two. Also, I would like something more visual. I have heard rumors of a separation of dyes, but I have been unable to locate it. That sounds like an excellent lab, I just don't know what to use or where to get it. I have also heard of using cherry coke, but I am unsure of what if anything I should mix with it. Suggestions? Ideas? Recipes? Thank you for your help!