I've been making a real effort to bring my lunch to work more often. The step that will make me stick to this plan is upgrading from a deli plastic bag.

The Insulated Lunch Tote from the Container Store:
The 2-Tier stainless steel lunch box:

The Lacquer Bento Box:

The Melamine Tiffin round lunch box:
The Gourmet Getaway Lunch Tote: