The tumbler's double-wall vacuum insulation ensures that your hot beverages stay hot and your cold beverages stay cold. This feature also prevents condensation from forming on the exterior of the tumbler. The lid is designed to be splash-resistant, reducing the likelihood of spills. In addition, the tumbler comes with a flexible straw that can adjust to any drinking angle. Constructed from sturdy stainless steel, this tumbler is both BPA-free and long-lasting.