I've just moved into the new place, and stocking my very first pantry. I just realized that rolled oats and all the other cereals can develop moths and what not. Do I need to seal everything in rubbermaids as well or is there something else more cost effective? This is getting expensive. I noticed the LDS suggest adding packets that take air out of stored items. Is this worthwhile or over kill- and if required where do you buy them? Thanks.