My wife said that here family sends her refregerated food like cheese etc from Puerto Rico all the time..... there is a trick that makes using Dry Ice unneccesary.
She said they first freeze the food for 2 days, then they put in zip lock bags, then they warp it bubble warp and then in newspaper (in case it starts to leak water the newspaper soaks it up).
They then send it overnight or even 2day and it gets here still partially frozen or sometimes thawed out but still cold.
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