Riddles, brain puzzles and mathematical problems

[BAndrew]

Neptune is on fire!

You got it again

There are actually many ways you can do it, but you got the key idea that you can use 2^10 = 1024>1000 possible combination of rats. Therefore 10 rats is the minimum requirement. All you have to do is to associate the combinations with certain bottles.

Well done.

EDIT:I am going to take a rest. I'll probably post another problem tommorow.