When I read this suggestion in US News, it served as a reminder to finally follow through with my weekly thoughts to bring Tupperware to the office. Storing a few containers at your desk to take home leftovers from company-sponsored lunches in the office is a smart idea — around here we're constantly getting emails to scoop up leftovers before they're trashed. If nobody takes the food, it will be thrown away anyway, and it's a simple matter of remembering to bring the Tupperware in the first place.
You'll save money by getting another meal out of an already free lunch. You might be self-conscious in taking home leftovers and think your co-workers are judging you, but there's nothing shameful about wasting and spending less. If it's not implied that it's OK to take food home, simply ask the person in charge of cleaning up if you can pack up a doggie bag. Now, time to set a calendar reminder to bring empty containers to the office!