Whilibird, I use the Gamma lids which are very hard to pop off, cost a little more. I store the rice or beans in the buckets but do use the Mylar bags to store five to ten items in one bucket. People that have problems with rodents do need to store the buckets in a steel container or use the Mylar bags and store them in a steel trash can. This will do the same thing. Rodents also make it hard to store water in plastic.