The Corn Run

Having just opened the stray wallet,
its contents appears to be random.
The main glug of the wallet has got one playing card inside, half ripped.
An un-popped coin compartment contains a cartoon ring.
And the card slots seem to be housing what looks like a "Shopping List"

The list read:

Sweetcorn (Green Giant)
Low fat sweetcorn
Corn on the Cob
Corn puree
Popcorn
Corned beef
Pepper corns
Corn Flower

It's just really odd, this.
On the flipside of the piece of paper it reads Yellow Shopping.
Where's the other half of the playing card?
Someone's coming over, I'm putting it back!