I bought my cooler directly from one of the Lifetime Stores. I've used it for both hot and cold temperatures. I was most impressed with its performance when I took it with me on a service project. My group makes grilled cheese sandwiches, wraps them in tinfoil, then puts them in a cooler on a wagon to take around town to the homeless. We put bricks in the oven, then wrap them in towels for placement in the coolers to help keep items hot without melting the cooler. We also use standard coolers, as we have too many sandwiches to just use my Lifetime cooler at this time. The sandwiches stayed warm in the standard coolers with the brick. However, even in cold weather (mid-November in Utah) and distributing the sandwiches out of the Lifetime cooler last, the sandwiches were hot to the touch -- almost painfully hot! I'm excited to take my cooler on more adventures and push its limits.