Advanced Technology: Double wall stainless steel food jar features vacuum insulation;technology that keeps contents cold and warm up to long hours; Vacuum insulation maintains temperature of the contents longer, which inhibits bacteria growth and spoiling√ Excellent Design: the stainless steel interior and exterior is durable and withstands the demands of daily use; The double wall design allows this food jar to stay cool to the touch with warm foods and sweat-proof with cold foods√ Premium Material: Superior vacuum insulated soup & food thermos, double wall stainless steel,food grade material protects your health and the quality of your food√ Wide Opening: the wide opening of the dragon food jar is easy to fill, eat from and clean; It is a great way to pack fresh and healthy meals for school or on the go. The Food Flask is just the right size for food,snacks and in-between meal temptations. Suitable for toddlers, kids and adults.