We changed our drinks machines at work and they now have waxed paper cups. These are great for growing all varieties of beans in, also for cucumbers and courgettes. As a bonus, we have drinks stirrers which just about the right size for marking what kind of seeds have been sown in a seed tray. At the end of each season, I can clean off the markings and use them again, As for the drinks cups, they only work for one season, as the wax effect wears away. Then they can be composted as normal card or paper.
Perhaps you have something similar where you work.
