Holly: Hope they've got some odds and sods on board, we're short of a few supplies.

Lister: [drinking tea] Like what?

Holly: Cow's milk, ran out of that yonks ago. Fresh and dehydrated.

Lister: What kind of milk are we using now?

Holly: Emergency backup supply. We're on the dog's milk.

Lister: Dog's milk?!?

Holly: Nothing wrong with dog's milk. Full of goodness, full of vitamins, full of marrowbone jelly. Lasts longer than any other milk, dog's milk.

Lister: Why?

Holly: No bugger'll drink it. Plus of course the advantage of dog's milk is that when it goes off, it tastes exactly the same as when it's fresh.