"It's frothy man!" So the ad said. Cresta was the orange flavoured, probably the sweetest most plastic-tasting drink you can imagine but as a 7 year old being dragged round Clacton market, it was probably the best taste in the world. Cresta was opaque and thick and frothy - God only knows what was in it! I worked for Schweppes at the time, the original had real milk but it was a nightmare for quality control due to milk going off and caused a lot of problems with line and equipment cleaning (CIP). Not sure what was in it additive wise but obviously the shelf life was improved when milk was removed. No doubt plenty of people preferred the original taste to the newer one.