[12] Reminder

I was in the train this morning and noticed a funny advertisement in the 'Metro'. It's probably done before but I'd never seen it and thought it was pretty remarkable:
A shiny sticker pretending to be a post-it, reminding the person reading it to bring Sloggi underwear (3+1 for free). On the post-it is a big arrow, pointing to the original add, which is in the newspaper itself. Which I never even would have noticed if it wasn't for the post-it!
The placement and material are really cleverly thought about. Newspaper = mat paper, shiny sticks out. Front page heading is first read, sticker overlaps it!
I didn't actually buy the products, but at least the brand got my attention!