Sigh. Dr Fuller's advice is to keep lunch box portions smaller and simpler. "So don't have big sandwiches and big pieces of fruit and things like that." "Try to have a variety of smaller items ...

More from Big Batches At Mugga Dosirak in South Korea, a team of three chefs and 15 staff members cook and package 10,000 lunch boxes every week by hand, and sell around 400,000 lunch boxes every ...