Red Dwarf, Series II

Holly:
We're a bit short on a few supplies.

Lister:
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 back-up 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 type of 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.

Lister:
Why didn't you tell me, Holly?

Holly:
What, and spoil your tea?