You’ve just had soup for lunch, or perhaps coffee for breakfast. You’re left with an empty cup, seemingly made out of cardboard, which can’t be used again. So what do you do with it?

If you’re like me, they stack up on your desk, a wavering tower of guilt. It’s about time I did something about them, actually, so rather than spout another ream of green-tinged paragraphs, I thought I’d investigate if there’s an environmentally friendly way of clearing these cups from my desk…