The RTIC coller we used this past May is very light and fit in a checked bag. I used dry ice to ensure everything stayed frozen for 36 hours as we spent the night in St. Thomas before going to Anegada. It is a good idea to put the dry ice on both top and bottom . The dry ice holds up best if placed in a gallon freezer bag. Whatever cooler one chooses, it saves 100's of dollars on food costs.
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