This easy storage switch can help save your pantry staple.Credit: Simply Recipes / Getty ImagesWhen I was 21, I moved to Italy to study food. I stocked my tiny apartment’s cupboards with what I considered the essentials—flour, sugar, salt, and pasta—then took off for much of August, when Italians famously decamp for Ferragosto.When I came back, I opened my pantry and shrieked. Tiny bugs were crawling through the bag of flour I’d left sitting on …