The extra-large pack can be used in extra-large coolers. Extra-Large: 11" x 8.7" x 1.9" -- 5 LBS.These reusable and rugged ice substitute cooler packs maintain low temperatures longer than ice or "blue gel" products. The active ingredient is a plant-oil derived "phase-change material". These cooler packs are reusable, non-toxic and biodegradable and are not derived from petroleum products or alcohol like most other cooler inserts.
When Arctic Ice approaches its melting point (that's the phase change) it begins absorbing more heat while stubbornly refusing to warm up. It holds a constant, pre-defined temperature until the entire cooler pack finally thaws. These flat panels save time and money when compared to using bagged ice. Simply store in any home freezer until ready for use. These cooler packs are top rack dishwasher-safe.
The Alaskan Series is specifically designed to keep your beverages and perishables refrigerated all day or longer. One or two of the large packs is perfect for keeping your medium size cooler perfectly chilled all day long.