The Simple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid in Midnight Black is designed for both style and functionality. This tumbler features double-walled, vacuum insulation to keep your drinks hot or cold for hours. It is made from premium 18/8 stainless steel, ensuring durability and a sleek look. The ergonomic handle provides comfort and ease of use, making it perfect for on-the-go hydration. The included straw lid is four-way threaded, allowing you to place the straw in four different positions based on your drinking hand preference. This tumbler fits standard cupholders, making it ideal for travel. With a variety of color options available, you can choose one that matches your style.