Fallout is a widely popular video game series. The game has a post-apocalyptic and retro-futuristic setting, The game follows Vault who is searching the shelters for Water Chip to save the survivors.. Nuka Cola was the most popular soft drink in the country prior to the apocalypse. The drink is valuable and the tops can be used as currency. This officially licensed Fallout key chain is a bottle opener with a Nuka Cola logo on front. Great gift item for fans of the Fallout video games.