In Oz, our ones and twos are coins, fives are pink, tens are blue, twenties are orange, fifties are yellow and hundreds are green. They are quite colourful and attractive, and vary in size - Aussie money

The only thing I don't like about them is that they are made of a sort of plastic, instead of paper like the older ones, which makes them very hard to fold. They keep springing back to the way they were last folded. I gather the bank tellers don't like them for the same reason.

Come to think of it, and to sorta bring this thread back to the title, they feel rather smooth and greasy, as if they were coated with teflon - maybe they are - just like our PM, sometimes known as Teflon Johnnie, because mud doesn't stick to him.