The blue Field Museum logo is sealed between the tumbler walls. Tervis tumblers feature double-wall insulated construction that keeps drinks hot or cold longer and reduces condensation to prevent rings on your table. This 16oz classic mug features a comfortable and easy-to-grip handle. Strong, impact-resistant BPA-free material means these tumblers can take a tumble without shattering and won't retain tastes or odors. Mug also comes with an easy-to-clean BPA-free travel lid.