I’d suggest y’all start buying 50 lb bags of white rice...
As well, buy your juice in the plastic containers with the large lids. Rinse them well when you are done, soap them out and rinse again. After they dry, fill them up with your rice and inside he lid run some hot candle wax inside the rim. Just prior to the wax “setting”, screw the lid on.
Its not perfect, but it will keep the rice a hell of a lot longer than 50 lb. bags (and yes, you need a lot of the juice bottles..I’ve been at it for a few months now).