We have a very small cooler that fits inside of a rolley bag, that we take on the plane with us. The one and ONLY time that we put meat into a checked bag, the bag went missing and we did not see it for 3 days... That was a mess.
We chamber vac everything perishable and some other items too that might leak. Never had a problem with leakage or spoilage in our checked bags. Ziplocs don't cut it.
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