Tervis tumblers feature double-wall insulated construction that keeps drinks hot or cold longer and reduces condensation to prevent rings on your table.Strong, impact resistant BPA-free material means these tumblers can take a tumble without shattering and won't retain tastes or odors.Most tumblers are microwave, freezer and dishwasher safe for no-worry convenience and fit most cup holders. Item cannot be shipped to P.O. Boxes