A note about ice packs--
National Public Radio's _All Things Considered_ recently mentioned a company in Nova Scotia packing lobsters for its travelling customers. Pre-Aug.10, they used a gel-based ice pack. When the regulations went into effect, they started using ziplock-freezer (clear) bags of frozen peas. They're cheap, edible, and they reportedly stay colder longer.
source: Business Finds New Way to Chill Carry-On Lobster
http://www.npr.org/templates/story/story.php?storyId=5705299
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