A suggestion from Franto:

My office has a water cooler with a supply of plastic cups. I don’t go anywhere near it and fill my glass from the tap but my work colleagues seem to use a new cup for each sip of water they take, the bin is always over following with the damn things. I want to rescue them but don’t know what to do with them.

These people seem to collect plastic cups from workplaces in bulk so that might be an idea – but has anyone got any reuse suggestions?

(photo by reemreem)