High Quality Materials: Made of durable double oxford fabric and thick aluminum foil, it gives a more durable feel. Keeps your food cold or hot for about 4 hours, safe and non-toxic, ideal for packing your food and lunch containers. Heat Preservation: The sealing degree of the lunch box will affect the length of the holding time. If the lunch box is made of glass or ceramic, you can heat the lunch box before use. Because glass and ceramic will absorb the heat of the food. Sturdy and durable: stylish stripe design, high-quality material, tear-resistant, wear-resistant, mildly waterproof, dirt-resistant. Leak-proof insert, easy to clean. Widely used: The lunch bag not only can be used as a lunch bag, but also can be used as a baby bag, a makeup bag, a shopping bag, and an organizer bag. Perfect for work meals, picnic meals, outdoor BBQs, diet management or medicine storage, also can be used as a sun tree bag or tote bag. Large capacity: Size: 23 x 17 x 15 cm, perfect for lunch boxes , snacks, fruit or vegetables.