【12 HOURS COOLING FUNCTION】Insulation in 3 unique layers work together ,Outer layer has a water-proof surface which ensured no sweat, middle layer is high density foam and the interior is fully lined with leak-proof material. KUYOU cooler lunch bag is designed to perform stay cool 12hours in harshest conditions for make food stay fresh all day.【100% LEAKPROOF COOLER】With water-resistant premium food-grade aluminum foil, is 100% leakproof. Made of 600D exterior Oxford Fabric which is easy to dry for storage. The interior lining is made from PEVA foil and padded with 8 mm EPE foam for great thermal resistance. Also the interior is dirt-proof and easy to clean.【15L LARGE CAPACITY】Cooler Lunch Bag Volum holds 15L (4 gallons), and maximum load capacity over 30 LBS. It can hold 24 cans (330ml) or 8 bottles (500ml) at the same time. Ideal for picnic, camping, hiking, BBQs, etc.【WIDE OPENING DESIGN】Wide-mouth opening means great accessibility and visibility to contents, helping you quickly locate cold food and drinks. Collapsible soft cooler can be stored easily,fold it flat and pack it in your luggage or to store frozen food when you shop. Also perfectly placed in the trunk of the car, especially suitable for camping, fishing, water parties and hiking.【Two Ways to Carry】 With upgraded padded top handles and adjustable shoulder strap, cooler lunch bag is more durable and comfortable than others. To pick up the light loadsor grab the side handles for heavier ones depends on your needs. You can use it as a handle bag or shoulder bag. Perfect for picnic, office, school, travel, camping, hiking with lunch, etc.