Over the last 120-plus years, Coca-Cola has become a master at ignoring or downplaying rumors about its product. Coke comes in handy for removing rust from old nuts and bolts (it does). The original formula for Coke included cocaine (it did). Coca-Cola makes an effective post coital contraceptive (it does not). Coke's ad team invented the modern image of Santa Claus (they did). "Coca-Cola" translated into Chinese can mean "bite the wax tadpole" (that is true).
So many urban legends have emerged based on Coke that collectively they create a unique category called Cokelore. The cans that Coke arrives in have their own legends as well. Back in the 80s, it was the aluminum used in the cans that were in question; the metal was rumored to be giving everyone Alzheimer's.