Need (quart to gallon) bug-proof food containers/5gal bucket (Redway)

I have some dry goods: flour cornmeal and pancake mix stored in my cupboard in those compostable bulk food bags, that these tiny little beetles have begun colonize a few weeks ago.
.
They've also been joined by another almost equally small pest who's burrowing though and leaving these little cocoons throughout that the moth-like adult stage eventually emerges from to start flying around and burrowing into the various foodstuffs all over again.
I don't know how they're all flourishing SO prolifically in my stashes of near-zero water content powdered foodstuffs, but I'm getting really tired of wasting money to feed a bunch of little bugs.
So I'm trying to get a few medium to large sized containers (qt to gallon to multi-gallon), glass or food grade plastic (or ceramic, etc?) with screw on or tight fitting snap-on lids, or any bug-proof design basically.
.
Also: if you can spare a 2 to 5 gal bucket with a matching lid, that would be perfect for a bug-proof compost container.
Thank you!