Durable stainless steel construction with excellent heat retention 2 microwaveable inner bowls: Main Bowl 10 oz. / Side Bowl 11 oz. Washable nonstick coated outer container , Heat Retention After 6 Hours - 127°F , Cold Retention After 6 Hours -52°F Includes chopsticks, chopsticks holder and easy to carry tote bag Made of BPA-free plastic and stainless steel