1. Capacity: The size of this lunch cool bag is 21*14*13cm/8.3*5.5/5.1inch. The capacity of this small cool lunch bag is 4L, It can hold 6 cans of drinks. This small cool bag can perfectly fit your lunch box for you work or day trip. 2. Well Insulated: Eco-friendly aluminium foil keeps your food cool or warm for about 4-6 hours. BPA free materials, it's non-toxic. This adult lunch bag make sure you can enjoy fresh and delicious food. 3. Portability: This handy little lunch cooler is light weight. Perfectly fits your backpack and briefcase. This squqre cooler bag is folable, save your storage space. 4. Waterproof & Leakproof: This reusable small cooling bag made of high density water-resistant. Small lunch bag durable and easy to clean interior lining. Prerfect thermal insulated, 5. Smart design 4L lunch bag: The style of this small insulated bag is simple and classic. Just the right size meet your daily needs. You can also used as a snack bag, sandwich bag. Suitable for all people such as adluts, men, women and kid.