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Prechill coolers by placing a few ice cubes inside an hour or so before loading your cold beverages and food. • Put ice in last - Cold air travels down. Load cans and bottles first, then cover with ice for maximum cold-keeping. • Use crushed or block ice - Crushed ice cools food and drinks fast; block ice lasts longer. As an alternative to block ice, prefreeze drinking water or juices in clean milk jugs. They’ll help keep foods cold and provide a handy source of cold beverages as they thaw. •