This comes of pretty judge-y. Take a moment to consider all the waste you also produce each day.
Not to mention you're making the problem worse by making people defensive about their decisions, which just makes them go deeper and be unwilling to compromise. Try to solve the problem instead grand-standing.
I hope that no one identifies with those machines so much that they can't take valid criticism of what that thing leads to. Sure incorporating of objects into ones self image is common, but I do not think we can solve it by tip toeing around the issue. Yes you are affecting the climate and your local environment by all your actions, quite a lot and this particular thing is horrible.
There's a difference between acknowledging the problem and tackling it, versus cynically shaming the person. ("well if you get your cup in 30 seconds, I guess destroying the planet is fine") That just makes it into a personal attack, regardless of being a casual user or a Nespresso devotee.
Not to mention you're making the problem worse by making people defensive about their decisions, which just makes them go deeper and be unwilling to compromise. Try to solve the problem instead grand-standing.