slogan about cheez it! not their's (get your own box!)make one up.
You are basically trying to encourage people buy Cheez-Its by making them attractive. If you have Cheez-Its, you will be the envy of the neighborhood. Why not have a commercial where a person is walking down the street with a box of Cheez-its, and everyone that sees the person follows. At the end of the commercial, there is a trail of people. Then the person turns around and says: It’s not yours, get your own box!
Your request isn't very clear - are you asking for help making up an alternate slogan for Cheeze-Its?
If so, how about something like "Don't be cheesy...share!" ?
Maybe you could have a picture of some kind of monster or creature eating them, with the slogan "Cheeze-Its please it!"
What about a picture of a squashed box with: "Please don't Squeeze the Cheeze" ?
Advertising often employs logical fallacies to draw in their target audience. Try:
Appeal to Authority: Mr. Handsome Actor loves eating Cheez-its before every scene.
Post Hoc: I ate Cheez-its and made an A+ on my English poem, so if you eat Cheez-its, you will too!
Ad populum: Everybody is eating Cheez-its, you should too!
When I think of Cheez its, I think of pleasant childhood memories. It's also a baked snack, which is healthier than some of the fried chip style snacks out there. You might come up with a slogan that combines these two ideas - nostalgia and healthy snack options.