RUBbing me the right way

 20 RUB free with every box of Oreo's. But I'm on a diet so I only ordered 1 box of Oreo's 

There was a sale, and I had a discount coupon and I find these Really Useful Boxes....really useful! And they even gave a small box of Oreo's for free. Like, bargain.

I have an attic of stuff to sort, sue me :P