Bringing cereal for lunch?

I know they sell those little mini cardboard cereal boxes that you can rip and make into "bowls" to pur the milk right into box. I want to bring cereal from home to eat in the cafeteria at lunch, but I would like something healthier than kellogg's brand cereals (and yes, that includes skecial k, that's not healthy either.) Does anyone have an idea for how I can bring cereal from home without too much mess/hle? Thanks a ton.