The refinement phase focused on testing and validating the system’s core technologies and user touchpoints. RKS explored multiple pod configurations—including stacked donut capsules and multi-flavor systems—to optimize flavor delivery, heat distribution, and ease of loading. Foam models and Frankenstein prototypes were created to evaluate ergonomics, airflow, and system performance in real-world settings. Each component, from the hose to the heating chamber, was redesigned for durability, cleanliness, and performance. Through dozens of iterations and design sprints, the Reva team fine-tuned the balance between cultural authenticity and cutting-edge usability—resulting in a product that delivers consistent clouds, smooth flavor, and minimal cleanup.