I have a collection of Lock n' Lock containers precisely for that reason. If it is not mold, then it's ants/roaches/bugs (especially rice) and then, as Dragonbones said, use secant packets.
Lo urgente no deja tiempo para lo importante. Mafalda.
“Take it from an old guy. The waves never stop coming, and somehow you don’t really want them to. But you learn that you’ll survive them. And other waves will come. And you’ll survive them too. If you’re lucky, you’ll have lots of scars from lots of loves. And lots of shipwrecks.”