Pests can develop here without being observed and explode into near unmanageable numbers. Most cupboard pests can chew their way into cardboard boxes or plastic sacks. Place stored materials into tight-fitting containers, preferably of glass or other tough material. If an infestation should occur under these conditions, it probably will be limited to a single jar. Glass jars should have rubber seals, and plastic containers must have tight-fitting seals.
Tiny hatchlings can crawl through even the tiniest of gaps.
The best storage is cool and dry. If at all possible, you may want to consider refrigerated storage of little used but important dry goods. When dried pet foods are accessible to mice, an unusual problem may occur. Rodents steal the pet food and may store large quantities in unobservable places, as in wall voids and sub-floor spaces. Then, if meal moth pests locate the stolen food, you will have a difficult time finding and removing the problem source.