Ants get into everything they can. Weevils and worms frequently are already inside the flour & grain & lentils & beans & so on bags, so you don’t want to keep a bag of flour for even three months and assume it’ll still be fine – it likely won’t be. Mung beans will have holes mined through them in a month or so. I’ve found tiny bugs inside my unopened cocoa powder bags – cocoa now goes into the freezer. Bit of a pain in the butt, but what are you going to do?
And baking powder! Did you know that there are bugs that’ll eat baking powder? Seriously! I wish I were joking, and I wish it were a fluke, but no, it happened to me twice. In air tight containers. New ones are now stored in the fridge. 🙂
Then there’s the humidity problem. Icing sugar cakes, lumps, and gets hard as a rock, and the only way to deal with it is to put it in the whir whir and let that go at it for a few minutes, and even then, you’ve still got lumps left over. And anything with a high fat content goes rancid quickly.
Yeah, and our fridge/freezer ain’t all that big, so you can’t store everything in there. You pick and chose your battles and deal with the fallout as it happens.
Welcome to the tropics. 🙂