On my last course I bought one from Argos used it for the duration then took it back saying it wasn't what I wanted. Not strictly legal but I am sure Argos are happy to know that they helped me out in a big way.
Saw someone laminate a boil-in-the-bag bacon and beans on exercise once. The silver foil looked empty - until all the bean juice was squeezed out into the laminator. All you could smell was the scent of burnt beans. Quite amusing.