Limited time new product sale - price going up soon this mug will never feel hot or cold to the touch due to the double wall vacuum insulation. That means that your hot drink stays hotter longer and ice stays frozen longer (up to 24 hours!) our straw-friendly, thick polycarbonate double gasket lids are BPA-free and have either a combination opening that works great with or without a straw or a sliding lid that seals closed. Our premium 18/8 304 grade stainless steel won't alter the flavor of your drink and it resists corrosion to stand the test of time.