
What's the perfect material to use in packing food for an 8 hour travel to Los Angeles
It depends on what food you will pack. Plastic containers are probably the best and the easiest way to pack your food, if you're planning on to eat the food along the way then plastic containers is perfect.
Bringing the food all the way to Los Angeles its best to use paper if it's possible because it allow air to pass through, this will prevent your food from spoiling.
Here's a link which contains a few tips in packing your food or snacks:
http://airtravel.about.com/od/duringyourflight/ss/packingsnacks.htm

