I have the fit and fresh (not sure if we are talking about the same thing.) It is nice because it has an ice pack that fits in the container to keep everything cold, but it's still plastic and it can stain and is hard to clean depending on what I've put in it.
I really want a set from here:
http://to-goware.com/
I understand that it can be hard to get in the habit of packing a lunch, but it is a really great thing to do. There are foods you can pack that are healthy, tasty, visually appealing and not boring. You can do it! If you pack all your food you will save a lot of money too. Maybe as an incentive you can put the money saved aside and buy yourself something you've always wanted once you reach goal?
I don't copy these sites, but find them to be great inspiration for lunch packing:
http://veganlunchbox.blogspot.com/
http://lunchinabox.net/
Good luck! You'll have the last 20lbs off in no time!