I took a clear plastic jar and cut a small hole in the side. She sees the cat food inside, and rolls and bats it around until a piece comes out. She always has such an appetite that I don’t need to fill it with actual treats, dry food works. Patent pending 
Proud of your ingenuity in producing a homemade “Whisker pet™ rolling cat treat dispenser “ for the smarty cats in your house! $4.99 Target. Comes with one bag of treats.
I’ve actually bought dog toys that had actual plastic water bottles in side a tube sock shaped cover. For the crinkly effect, I suppose.
But mine is hand crafted, and that has to count for something. Etsy here I come.
Ahh. Artisanal..got it.
The homemade version has an even better perk! You don’t buy a pre-made toy and the cat has more fun with the packaging than the toy/feeder. Which happens all the time in my home.