We have 4 jars. (Family of 5 includes Mom, Dad, 14 yo DS, 4 yo DS and 1 yo DD who is still nursing)
Food = $900/month (everything that we eat whether it comes from a store or a restaurant)
Incidentals = $200/month (non-food items that are necessary such as diapers, cleaning supplies, toiletries, cold medicine, household items. we also buy gifts from this jar)
Clothing = $120/month (clothing and shoes for all 5 members of the family)
Entertainment = $80/month (fun stuff...