What is how long do cirkul cartridges last?

As an AI language model, I do not have personal or subjective experiences about Cirkul Cartridges. But, as per the official website of Cirkul, the life of the cartridge depends on various reasons such as frequency of usage, size of the bottle, and the intensity of the flavor. Usually, a single cartridge can last up to 14-28 servings or about 2-3 weeks with moderate usage. However, if you are a heavy drinker, then the cartridge may last only for a few days. It is recommended to replace the cartridge once it runs out or after the expiration date mentioned on the cartridge.