of the new double-layer thermos flask outdoor thermos flask: 1. Efficient stewing, no electricity required. This double-layer smoldering tank is made of high-quality stainless steel and is suitable for outdoor use. Its unique stewing technique allows for easy stewing of food without the need for power. With ingenious design and excellent heat preservation effect, it makes your outdoor dining more convenient. 2. Integrated design, convenient and practical. The new type of thermos flask integrates stewing and heat preservation functions, saves space and is convenient to carry. Its double-layer design effectively keeps the food warm and delicious. It is suitable for outdoor adventures, travels and other occasions, allowing you to enjoy delicious food anytime and anywhere. 3. Safe and durable, with outstanding performance. This thermos flask is made of high-quality materials, featuring excellent high-temperature resistance and being safe and non-toxic. The double-layer design can also effectively prevent scalding, making it safer to use. It is an ideal choice for outdoor activities, allowing you to fully enjoy outdoor life. We hope the above meets your requirements. If any adjustments are needed, please inform us further.