I was out to my local Sam's Club the other day, and noticed they had a 150qt Igloo 7 day ice chest on sale for $70, and it got me thinking....I have a couple of the smaller Coleman 5 day coolers that worked well in 05....a lot of my leftover food is frozen in disposable plastic containers, and I have enough to fill one of the small chests....I know that would be good for at least 4 days if not opened, and possibly longer with all the thermal mass...

I have a 5 cu.ft. chest type freezer, and a 3500w generator (that I would prefer to not run continuous), but after say 3 days of power outage, would like to make ice to augment the coolers....to make the cubes more practical, keep them to the size of a normal refrigerator ice cube tray

my question...what kind of mould would you use to make a lot of ice cubes in the freezer?...they would have to be stacked vertically to make best use of the freezer

baking pans and then crush the ice
zip loc bags laid flat and then crush
small plastic cups
styro egg cartons

your ideas welcomed....