i'm wondering if i shape my rice krispie to what i want and then store them in a ziploc bag in a cool area, how far in advance can i make them? also, would it help if i coated them in chocolate? or waited closer to when i need them.

THE DATE IM LOOKING AT NEEDING THEM IS APRIL 16,2011

I ate some krispie treats I made 3 weeks ago and they tasted fine. They were covered in fondant and that might have helped. I always crush about half of the rice cereal and add a little chocolate when I melt the marshmallows because I think they are easier to form that way. They are very tasty.