Get one of those cases from Harbor Freight Tools, they have the foam plugs you can pull for fitting like pelican but the cases are CHEAP and NOT water tight like pelican and do not have a lifetime warranty like pelican.
I have pelican and Harbor freight cases, depends on what you are storing and its value. Specifically for me, ammo cans and pelican cases because of flooding where I live are the choice. Not a single ammo can that was under water for over a month was wet on the inside. My friends gun store in St. Bernard (Chalmette Louisiana) was under for about a month and all the ammo cans were dry on the inside. Rough but they work and are cheap. Buy some foam.