Cooler bags are also called warmer bags. Hence these bags can be used to keep your food cool or warm whichever you want. The bags are lined with insulation material to prevent any heat loss or heat gain. However, they can only keep your food either cool or warm for 4 hours.
Cooler bag warmer bag insluated cooler bags Picnic Lunch bags:Thick, collapsable and foldable bag, adjustable and detachable shoulder strap.Large volume. 2 compartments on front side, 3 string bags on back. A insulation layeron top can hold many things.Zip smoothly, comfortable shoulder strap.Can keep fruit, breast milk, milk, tea,drink,seafood fresh, also can keep your lunch, picnic warm.Great for camping, travelling, hiking,picnic, outdoor work, etc.