Styrofoam linernGreat for all fishing conditionsn3.5 -Gallon containernKeeps Bait CoolernGreat accessory for ice fishingnThe Challenge Insulated 3.5 Gallon Bucket with lid is perfect for ice or hot weather fishing. Challenge Plastic Products, Inc is a custom injection molding operation in Edinburgh, Indiana which manufacturers fishing accessories and other products. We use state of the art injection mold presses. Besides fishing, we supply plastics to the automotive and house-ware industries. We know plastic!