I usually bring my (slow cook) oatmeal to school with me and nuke it in between my classes for breakfast/lunch. The way it normally goes is one container contains my rice milk, the other contains my oatmeal/seasoning, and then I add the two and microwave. Would it turn out really gross if I just put the oatmeal and rice milk in the same container in the morning but didn't heat it until lunch time? I guess I'm wondering how much of it would absorb before I heated it, and whether it would become wall paper paste. It would just be easier to have everything in one and stick the whole thing in the microwave.