Its a small part of Brand Equity - Brand Positioning Statement of Coca-Cola

8. REASON TO BELIEVE
 It is a very famous brand.
 One of the benefits of drinking Coke is that it contains
caffeine, a natural stimulant found in the kola nut,
coffee beans and tea leaves. Caffeine makes you feel
more alert when you're tired and might increase your
performance when embarking on certain tasks. But
Coke has a very small amount of cocaine, so don’t
worry for being addicted as drug.
 It always innovates in order to make some new kinds
with high quality aimed at protecting consumers’
health.