Description: Made of food grade silicone material, FDA approved, safe and environmentally friendly, resistant to high and low temperatures, durable and reusable. Foldable design saves space, lightweight and portable, easy to carry. Can be placed in the refrigerator and a microwave oven, convenient to use. Soft, beautiful, fashionable and generous. It can be cleaned with water, easy to clean. Great for camping trip, hiking, backpacking, travel, train trip, lunch, picnic and sport event. Specification: Material: Silicone Size 350ML: Unfold size: Approx. 135 x 100 x 65mm/5.31 x 3.94 x 2.56inch Folded size: Approx. 135 x 100 x 30mm/5.31 x 3.94 x 1.18inch Size 540ML: Unfold size: Approx. 165 x 105 x 65mm/6.50 x 4.13 x 2.56inch Folded size: Approx. 165 x 105 x 30mm/6.50 x 4.13 x 1.18inch Size 800ML: Unfold size: Approx. 185 x 125 x 80mm/7.28 x 4.92 x 3.15inch Folded size: Approx. 185 x 125 x 30mm/7.28 x 4.92 x 1.18inch Size 1200ML: Unfold size: Approx. 220 x 140 x 80mm/8.66 x 5.51 x 3.15inch Folded size: Approx. 220 x 140 x 30mm/8.66 x 5.51 x 1.18inch Package Includes: 1 Piece Folding Silicone Lunch Box Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference.