According to Australia's Department of Health, the National Healthy School Canteens project was created in 2004 to make canteen lunches healthier. Canteens provide food guidelines for children to help them make healthier choices during lunch.
Healthy Kids explains that the provided meals in school canteens follow "traffic light" colors. If food is labelled with a green color, students are encouraged to consume it because it is nutritionally rich. If food is labelled with a yellow color, students are warned that the food is processed but still provides nutritional value and should be eaten in moderation. If a food is labelled with a red color, school canteens are allowed to serve it only twice per term because the food has little to no nutritional value.