These cold packs take about six to eight hours to reach a freezing point of 28 degrees F and are the ideal ice packs to keep your beverages and food cold at a tailgate or an afternoon picnic. It claims to keep drinks cold 50 percent longer than ice alone, and we found this to be true. The Arctic Ice Chillin’ Brew Series ice pack ranks as our best overall due to its reliability and design. What We Don't Love: The 10.5-inch XXL size may be too large to fit in small coolers and freezers What We Love: Great for tailgating or picnics, keeps items cold for as long as advertised, easy to clean