my cats new favorite form of entertainment is

[bruffin]

sitting watching the bubbles in a bottle of sparrkling water

As long as he doesn't try to catch them and knock it over! A glass of water gets almost everywhere. (Although, in the way of things, not quite as far as a glass of milk.)

Its a large plastic bottle, when you have just poured some out the bubbles start rising and she sits there for ages watching it, no danger of spills thankfully.

Would you like to put money on that?

probably not