Importance of freezer for cruising?
DRY ICE - OMO:
It would take about 50 Lbs of Dry Ice, at a cost of about $30, to keep an ice-chest (& it''s contents) frozen a couple of weeks.
Beware of CO2 build-up, as the dry ice sublimates (condenses from solid to CO2 gas).
Don''t store "unfreezable" stuff in the same box.
Thoroughly check out < www.dryiceinfo.com > before using.