Added 5 drops to 10 ml unflavored. A very nice replication of cola soda. Bright and refreshing, with a wet mouthfeel. The throat hit is less compared to other cola flavorings. Sweetened perfectly. I then kicked it up a notch by adding the Cooling Agent. Now I have a splendid cold cola vape that has me chain vaping. It's nice that we can design premium juice with very potent flavorings at our fingertips. 