Coca-Cola memorabilia collectors value the cartons and cases used for Coke products. The six-pack cardboard holder, introduced in 1928, is one of the early packages, once common with Coke products. Some collectors also prefer wooden cases. The pairing bottles represent an even better alternative for contemporary packaging. Even the bottle caps can be valuable collectibles, since they have also been issued as commemorative items as well. There was once a contest which awarded a free case of Coke for collection a bottle cap from each of the 50 states -- and a full set of these would thrill collectors. Many Coca Cola collectors have a very narrow focus in their collecting. Some Coke items were licensed by the company but aren't actual beverage items. These include china, glasses, sweat shirts, t-shirts, key chains, stuffed animals and thousands of other items over the years. An excellent source for finding Coca-Cola memorabilia is the internet. Searching the term will give literally thousands of hits and you can also find tons on popular online auction sites.