Wide Mouth Opening: The 9 cm wide mouth opening is large enough for children, making it very convenient for them to eat, fill, and clean quickly. The food container has a capacity of 450 ml, satisfying children's appetites. Also great for adults with smaller appetites. Keeps Food Hot or Cold for a Long Time: Before packing food, add cold/hot tap water to preheat or pre-chill the jar. Our insulated food container can keep liquids hot and cold for 1-3 hours. Exquisite Workmanship: The wide mouth makes it easy to fill, eat from, and clean. It's the perfect size for a meal, and its shape promotes a better grip and easier handling. Easy to Carry: The 450 ml capacity holds your meal and fits into a child/adult lunch bag. The double-lid design includes an inner lid to prevent leaks. Wide Application: This insulated stainless steel lunch container is perfect for children, girls, boys, adults, and women for school, picnics, camping, and outdoor activities. Children will enjoy their delicious homemade food. Adults can also enjoy a hot lunch instantly at the office or outdoors. In summer, this insulated food container can also keep cold food cold for a long time. It's also a great essential gift for children starting the school year.