Best window display EVER

On my way this morning  to a  numeracy teaching class for ex-alcoholics, I notice for the first time a shop front I must have passed a hundred times in my life.

The care and expertise the owner must have lavished on his display doesn't bear thinking about

- Oh yes, good morning, do you have a white card with three round blue plasticky looking things stuck to it?
- Ah, I have just the thing for you madam. Now where did I put it...