If you own a brand, work with a brand or align with a brand, consistency is key in social interactions as well as business. I know this seems obvious but I’ve seen things go “out of alignment” in social environments.
This can play out very simply. For example, I just had a house concert with over 50 people. I didn’t run out and buy plastic cups and paper plates. I used every plate, cloth napkin, glass, fork, knife and spoon we own. Full disclosure, we did have to use some plastic forks but we washed them for future use. While our event wasn’t 100% trash free, it was at least 75% trash free. The event was partially pot-luck so we didn’t know what was being brought to us and in what containers or packaging.