following another great Doug Ritter tip, for last resort water storage (and of course primarily to help keep perishables cold during a power outage) i put as many 1.5L and smaller 16 oz. water bottles in the freezer as i could fit. (i opened them and poured out a tiny bit to account for freezing) it took 'em about 2 days to freeze solid but its nice to know i've not only got some ice blocks but drinking water as well if needed.