Ok, it's crap like this that makes me want to scream.
He didn't already own a cup or jar that he could have used for this purpose?
Give me a break! It's one thing to want to do what you can to help reduce man's negative impact on the environment, but this kind of nonsense is an attempt to shock people and get them to notice you. It's attention deficient behavior.
It's not about "saving the planet", it's about being acknowledged that you are "saving the planet".
It's not about doing good works, it's all about being perceived by others as doing good works.