Zoku Neat Stack vacuum insulated food jars. Keeps food cold for approx 6.5 hours and hot for 5 hours. Ideal for picnics/school lunches/days out. Easy to hold thanks to their kid friendly design. Durable double wall vacuum insulated 18/8 food grade stainless steel. BPA + Phthalate free. Stackable and leak proof. Perfect for a lunchbox or backpack. Genuine Zoku product.