For this problem, I personally think there are three reasons:
- Focus on quality
Japan and Europe, especially Germany, are well-known for their rigorous production processes. The metal can packaging has strong sealing and corrosion resistance, which can ensure that the product is stored for a long time without deterioration;
- Green and envmetalmental protection
metal products are degradable and recyclable envmetalmentally friendly materials, which are envmetalmentally friendly;
- Pragmatism
Considering the saving of raw materials and the maximum capacity, a uniform round or rectangular tin can can do this better.