Encell Rose Cooler Bag Insulated Sports Baby Travel Lunch BagFeatures Heat sink of strap handle provides you a humanization design releasing your hand and shoulder far away from stressFeatures of Encell Rose Cooler Bag Insulated Sports Baby Travel Lunch Bag Can be used for 4 hours alone, 12-16 hours with ice packs. 2-4 hours to keep warm, 3-6 hours..