College student Justin Kovitz and his dad Ray have spent the past year developing and selling Shake N' Share.
It's a plastic lid that fits over the popcorn tub.
It can be used as a bowl or to shake up the butter and other toppings.
If you can't finish it all, cover the popcorn and take it home.
Justin tells The Grand Rapids Press he got the idea at a movie, after seeing people spill their popcorn.
The Central Michigan University business student took the idea to his father.
The father-and-son team says they've sold about 220,000 of their popcorn tops.
