Thanksgiving, in some families, is prepared by Grandma, who has been slaving in the kitchen all day and then everybody shows up, watches football, inhales all the food, and forgets to thank her while they drift into food comas.
Thanksgiving, in my family, is a massive potluck to which everyone is expected to bring a dish. At least. You are expected to bring as much food as you plan to eat.
So portability is a problem. Tupperware melts when you put hot stuff in it, sometimes you don't want to transfer things from the dish you baked them in, and things get cold!
So I am pleased to share with you the greatest tool ever, not to oversell it.
The Pyrex Portables
These are great. They keep food hot, cold, and well packaged. They are insulated packages with hot/cold packs that solve the problem of melted tupperware.
Investing in plain old Pyrex dishes with lids is still a worthwhile thing to do - they're great for cold/cooled dishes, desserts, etc. and will make your holidays infinitely easier!
And if you grandma makes everything? Call her up and ask if you can bring anything. There is no better way to get favored grandchild status. Unless you clip her toenails. I think this is a no-brainer.