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Hi, welcome to Just Answer. My name is ***** ***** I look forward to helping you! If you are looking for a cooler to keep frozen foods for that long, you will need to get one with a compressor. The thermoelectric ones will keep it cold but not frozen. They are only good for about 40* below ambient temperature. Frozen food will keep a bit colder but will thaw within the time you require it to stay frozen.
There are luggage coolers, but they are not electric. Dry ice will work to keep the food frozen, though, you bet! It is not messy, of course, either. See the link below.