Max Cold Iceboxes from Igloo Coolers: "More than Cool" The MaxCold line is the ultimate product family for long-term cold retention (very popular at farmer's markets we believe!). The larger ones also make great insulated back-boxes for bike racks! Rigorously tested to exacting Igloo Cooler standards, our full size and beverage cooler range "holds ice under test conditions for up to 5 days in 90-degree heat!" (32C), and new this year another Polar white unit with 5-day performance in the 120Qt size. Outstanding insulation is what makes these 5 & 7 day Igloo coolers so cool, but they even look cold! Patented Ultratherm insulation in both body and lid for maximum cold retention. Square body design allows for extra foam in corners and around the drain plug. Refrigerator quality liner won't stain or absorb odours.