JEGS Square Jug Heat Shield protects the jug and contents from heat and sun allowing you to "keep your cool" on a hot day. Our tests reveal only a 3° rise in liquid temperature (shielded) compared to a 27° rise (un-shielded) on a 92°F day and after 1/2hr in direct sunlight! Designed specifically for the JEGS 5-Gallon Square Utility Jug (part number 555-80210, 11, 12 & 13) and JEGS Spill-Free Fuel Jug (part number 555-80221). Made in USA.