Scott: How can crushed take up more room? At any rate, I never buy crushed. I always mill my own grain because I read somewhere it keeps longer. I bought food grade poly containers at Smart & Final with resealable lids. Knock on wood, but I haven't had a rodent problem. Sometimes I have to leave poly bags of grain in a Coleman cooler until I have space in one of the containers. I would never leave a poly bag out in the open.