How does a post-mix soft drink dispensing system work?

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In a post-mix soft drink dispensing system, the machine operates by utilizing its own independent supply of water and carbon dioxide. Unlike pre-mix systems where the finished beverage is prepared in advance, the post-mix method performs the final preparation at the point of service.1

The system functions by carbonating the water on demand as it is needed. This carbonated water is then mixed with flavored syrup at the moment it is dispensed into the cup. This process allows for efficient, high-volume service in settings such as restaurants, bars, and hotels.1