Perfect for submarine enthusiasts and deep-sea explorers, this design celebrates the thrill of underwater discovery. Whether you're passionate about oceanography, marine research, or submersible technology, this is a must-have for ocean lovers. Ideal for oceanographers, marine biologists, and adventure seekers fascinated by the mysteries of the deep sea. A great gift for anyone who dreams of exploring the ocean depths and studying underwater ecosystems. Dual wall insulated: keeps beverages hot or cold Stainless Steel, BPA Free Leak proof lid with clear slider