The difference is that Coca-Cola, being an essential part of US history and, as such, appealing to nostalgia-driven folks...makes a lot of moola selling, or licensing, stuff that relies on the history of/nostalgia for Coke "way back when!" A recent promotion saw a supermarket chain offering 6-packs of 6-ounce bottles of the stuff, complete with crown caps (oddly, they didn't think of reproducing old bottle caps!).
Go figger (or let the accountants...)
Steven C. Barr