The reason why this beverage is not suitable for sale in Shanghai is the limitation of cold storage conditions and the concept of healthy eating.

1. Restriction of refrigeration conditions: large packaged juice needs to be refrigerated. There are many high-rise buildings and dense living environment in Shanghai, which increases the cost of distribution and storage, and it is difficult to achieve good refrigeration conditions at home.

2. The concept of healthy eating: Shanghai consumers pay attention to healthy eating, and worry that large packaged juice is "large in quantity and high in sugar content", while small packaged juice is easier to control the intake.