What's wrong with replacing the cartridge? That's covered in the article; it's pay per drink (approximately the same price as buying the drink at retail). It's

What's wrong with replacing the cartridge? That's covered in the article; it's pay per drink (approximately the same price as buying the drink at retail). It's not replicating any drink. It's mixing "natural & artificial flavors", the stuff used to make packaged foods like Coca-Cola taste like it does, consistently, not real beverages like a natural juice.