Some supermaxes even use food as punishment, serving the prisoners nutra-loaf, an unpalatable food brick that contains just enough nutrition for survival.

NEWYORKER: Hellhole

Airline food remains largely unpalatable.

CNN: Travelers discover the red-eye

Photos at Airlinemeals.net, a website dedicated to aeroplane food, illustrate the stodgy and unpalatable stereotypical imagery --- and reality -- that many airlines need to counteract.

BBC: A possible end to plane food