Having the right gear can make packing a healthy lunch that much easier. Amy of yummytoddlerfood likes to "invest in one quality lunchbox and one thermos so I have options for packing hot and cold foods. You don't need to spend $50 on a lunchbox, but do get one from a reputable company to ensure it lasts (and that they can help you replace it if it breaks too quickly)."
Amy likes to have a thermos on hand for packing leftovers that are best served warm like pasta, quesadillas, mac and cheese, and even pancakes.