1. Environmental awareness: Use reusable iron drums to reduce the production of plastic waste and reduce the impact on the environment.

2. Economic benefits: Iron drums can be reused for many times, which can reduce costs and improve economic benefits compared with disposable plastic drums.

3. Quality improvement: the iron drum has better sealing and thermal insulation performance, which can maintain the taste and temperature of popcorn and enhance the viewing experience of customers.

4. Innovative design: The design and production of iron drums can be diversified to increase brand exposure, and can also be used as gifts or souvenirs to increase customers' willingness to buy.

In a word, Wanda Cinema changed the popcorn bucket into an iron bucket for the comprehensive consideration of environmental protection, economy, quality and brand, aiming at providing customers with a better viewing experience and advocating a green consumption concept.