Great question ! It seems with the beverage flavors, finding something you can really taste is hard to do. I've ordered Red Bull, Cola and Dr. Pepper from 3 different vendors. The Red Bull I can taste but to me it doesn't taste like the drink. It's OK. The Cola and Dr. Pepper - nothing. I decided to go the "doubler" route and as a newbie, quickly learned doublers are for cutting and do not increase the flavor. So off to the flavoring route. I found Capella's has a Cola flavoring. About 20% Capella and VG - it's like drinking a Coke. Good stuff. I found FlavourArt has a Red Bull flavoring and have that on order. I've checked FlavourArt, Capella and LoRann for Mt. Dew or Dr. Pepper and nothing. If anyone knows of someone selling these, please let us know.