After a few ours navigating rapids, hitting the slopes, or corralling kiddos, you'll be happy to see that what you put inside our 18 oz Food Flask is still as piping hot or ice cold as when you packed it. From hot soups to frozen smoothies, it keeps our favorite foods at the perfect temperature. And professional grade stainless steel means it wont retain or transfer flavors. TempShield insulation keeps cold foods cold and hot foods hot. Durable 18/8 proGrade Stainless Steel construction. BPA Free and Phthalate Free.