Years ago at an aution hug bought two HUGE ceramic crocks, with lids. We have a pantry room which stays cool in the summer, with a small A/C in case it warms up above 60. White and whole wheat flour keep fresh. You’re in FL so... Maybe a small room with A/C might help flour stay fresh and bug free.
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I’ve always placed freshly purchased flour and cornmeal in the freezer for 24 hours prior to their storage in the pantry.
Never had a bug.
This. Works with rice too.