3 ms·How often do you rotate the supply? I do the same.by encoderer 9y agoHow often do you rotate the supply? I do the same.beambot 9y agoEvery couple of months.ggg9990 9y agoNo need, a plastic jug of water is good for decades. Yeah, it’ll have carcinogenic nasties in it after sufficient time, but not a huge problem for a temporary emergency situation.knz 9y agoYou can also use the water for purposes other than hydration (hand washing etc).