Bottle caps that circulated in the wasteland weren't just made from a capping machine.
Only the bottle cap of quantum coke with anti-counterfeiting code, manufactured after the economic crisis in 2150, possessed value. Moreover, the value of the 350ml bottle cap was different from the 660ml limited edition bottle cap. Because no survivor force could find a way to manufacture this type of cap so far, the value had remained stable. A large bottle cap was equal to twenty normal caps. The term "how many caps" was used in trading.
At the start, someone joked that "the anti-counterfeiting technology of the Coca-Cola bottle cap was better than banknotes; it could become the currency of third world countries someday, after all, their banknotes have been depreciating." In the end, this lighthearted joke became a reality. On the wasteland more than 40 years later, the bottle cap really become a currency.
