What kind of food I can secretly eat in cl?

I always am hungry in cl. I'm not talking about peckish, I'm talking about about-to-p-out kinda hungry. I've been sucking on Smarties for a while, but I'm getting tired of it. I'd have to keep it pretty discreet. cause I'm not supposed to be eating in cl. I do listen, so don't yell at me. I'm an A & B student. Any foods I can munch on and any tips on not getting caught?