HSS INSULATOR CIRCLE FLASK 40OZ HUNTINGTON SURF AND SPORT $ 44.99 40OZ / PURP - $ 44.99 Quantity This product is currently sold out. F22INSULATOR40CIRCLE-PURP The HSS Insulator is a wide mouth 40oz flask that will keep your drinks at the right temperature for hours. Whether you are having a cold drink or hot, this flask will help you be adventure ready.