PuTwo Resuable Lunch Bag, Insulated Tote Bag, Picnic Food Holder - Black Floral Keep Cold Time: 1-8hours (with lunch bag can keep 8-12hours) Keep Warm Time: 1-2hours (with lunch bag can keep 2-6hours) Do not wash by submerging entire lunch bag into water, the outer use soap water cleaning and the inner need to swab with wet cloth