Unlike the more structured, larger Adult lunch bag, the Lunch Bag can fold down and fit into a backpack if you want to use it on its own. This roomy yet compact insulated lunch box fits nicely into a backpack or an office fridge. For some bento boxes with rubber seals around the lid, wash by hand to avoid possible deterioration. Michael Hession To test for Adult lunch bag resistance, we splashed each bag with tomato sauce and let it sit overnight. With four and three separate, leakproof, microwave-safe compartments, respectively, they can handle a lunch with many moving parts perfect if you, like us, dream of keeping your coconut yogurt and lime-and-cilantro garnish separate from your turmeric pork curry leftovers. The large Mier Adult Lunch Box Insulated Lunch Bag had a baggy liner with folds that gathered crumbs and were difficult to Adult lunch bag and dry. We respect your privacy.