1)On your next flight, when u gash in with your gash bags in the cabin (surely they should be in fire containment bags anyway ?)retain 10 empty coffee cups and take them home and wash them
2) Proceed to Makro
3) Purchase catering size of Nescafe
4) Place heaped teaspoon of coffee in each cup (except the top one)
5) Take to work, resell - profit £9 per flight
"I CAN recommend the coffee sir - its home brewed..."