We haven't seen these cups at Starbucks, so we can only assume their dreamy nature is a concept only. But here's the gimmick, as handed down by the cup's creator, the Natural Resources Defense Council: To promote that left-y concern known as climate change, these cups change in color when filled with a hot liquid.

Like so: At rest, the exterior of the cup is green, showing a lush green planet filled with rainforests and Central Parks as far as the eye can see. But what happens when you pour a skim half-caf vanilla latte inside? The heat reacts with the cup, turning those green pastures into an ugly brown, like desertification might look like if this planet keeps warming!

Aaah! Feeling bad about the environment! At 7am with your first dose of caffeine! This world is unjust.

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Two more ways to ruin your morning by overdosing on green awareness, below.

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