This project/topic is really close to my heart, and creating this kind of research/design has been a great experience, in terms of practicing my design skills, and in learning more about the issue of single-use plastics.
From the research and interviews, I have realized that the term "sustainability" has evolved, and has come to bear different meanings depending on the person/organization that you ask. It has become one of the most used buzzwords, and different businesses and organizations have adopted strategies to contribute to this advocacy. Some might even argue, that it has been used as a marketing term to increase revenue - and I think this is true, but I also think it's not completely negative, especially when it's effective in spreading awareness.
In the end, balance has been an important factor in designing this features. Solving problems that maintains balance between business goals, user goals, and sustainability goals.
Going through this challenge, it has made me reflect, and made me feel grateful, that I am in this line of profession, allowing me to participate in contributing for the people, and for the environment.