Recently we've been getting inquiries about how long does a cooler bag stay cold?Can I put cooler bag in freezer?Can you keep ice cream in a cooler bag?Next, expert Weierken lunch cooler gives you a detailed explanation.   The first is about how long you can keep your lunch bag cool: even if you've been outside for 12 hours, you can still have a heart-cold drink and a hot meal, as if you had moved your own kitchen outside.       Other people ask us, can I put the freezer bag in the freezer? If you want to do that, we won't object to you. Even if you put this incubator in water, food will not get soggy, the same is true in the refrigerator. Because the exterior of backpack lunch box cooler is made of polyester, this material has the advantage of low water absorption.   And we added an extra waterproof coating, so it's super waterproof, and no juice will seep out. That means it won't stain your favorite coat in case you don't pack your food.       You might also want to know, can I put the ice cream in the cooler bag? Sure, but it shouldn't stay there too long.   So if there's no ice, can the cooler keep the food cold? No problem at all. Because our american made lunch cooler has a fully enclosed zipper, built-in non-woven fabric and aluminum-coated pearl cotton, it keeps heat well without the need for ice.   Finally, the dimensions of the Weierken lunch cooler: It measures 32 centimeters in length, 25 centimeters in width and 40 centimeters in height. The Weierken cooler lunch backpack helps you move your kitchen outdoors so that you can eat the most delicious food on your picnic camping trip.