The Thermos brand vacuum insulated 16 Oz food jar with folding spoon is constructed with durable, double wall stainless steel. Thermos vacuum insulation technology keeps contents hot for up to 7 hours or cold for up to 9 hours. The wide mouth opening is easy to fill, eat from and clean. As a bonus feature, this food jar includes a full-size folding stainless steel spoon that fits right into the lid, eliminating the need to pack separate utensils.