Is Wang Laoji's canned bottle cap flat or convex?

This is inferred from the product photos on the market and the feedback from consumers. Generally speaking, flat bottle caps are more convenient to store, which can protect the freshness and quality of drinks and avoid external pollution and oxygen entry. It is also easier for consumers to operate when using, and the bottle cap can be easily opened and closed without additional tools, which meets the needs of modern life convenience and rapid consumption.

Wang Lao Ji's canned bottle caps are generally printed with the brand logo and name. The bottle cap design is simple, with the word "Wang", one of the brand symbols of Wang Laoji, as the main element. This design makes it easy for consumers to identify Wang Laoji's drinks and has a high recognition in the market.