1. Capacity: This insulated lunch bag measures 21*14*13 cm / 8.3*5.5/5.1 inches. It has a capacity of 4 liters and can hold up to 6 cans of drinks. This small insulated bag is perfect as a lunch box for work or a day trip. 2. Excellent insulation: Environmentally friendly aluminum foil keeps food warm or cold for approximately 4-6 hours. BPA-free and non-toxic. This adult lunch bag ensures you can enjoy fresh and delicious food. 3. Portability: This practical small insulated lunch bag is lightweight and portable, easily fitting into a backpack or briefcase. This square insulated bag folds up to save space. 4. Waterproof and leak-proof: This reusable small insulated bag is made of high-density waterproof material. It has a durable and easy-to-clean lining. Excellent insulation. 5. Stylish design of the 4-liter lunch bag: This small insulated bag has a simple and classic style. Its moderate size meets your daily needs. You can also use it as a snack bag or sandwich bag. Suitable for all people, including adults, men, women, and children.