Insulated Grocery Bag

After planning my meals, I freeze everything I can before packing my cooler; meats, sauces, and liquids like juices or drinking water. I also freeze water in 24 oz. pop bottles. These fit easier than bigger jugs and can be packed so more food comes into contact with the ice. I pack the cooler and then put an insulated plastic shopping bag (from the warehouse stores) on the top of the food before closing the lid. I find that the food keeps much colder and the pop bottle ice lasts much longer.