- Triple Insulated Performance : Enjoy drinks at the perfect temperature, with cold beverages staying chilled for up to 36 hours and hot drinks remaining warm for 8 hours. Perfect for long days out or weekend adventures. - Durable Construction : Made from high-quality, food-grade 18/8 stainless steel, the Boulder insulated water bottle is built to last. It is BPA-free, phthalate-free, and contains no harmful liners, ensuring safe hydration. - Versatile Multi-Lid Design : The Boulder features an innovative multi-lid top, offering a wide opening for easy filling and a narrow mouth for comfortable sipping. The lid is interchangeable with our coffee and flip straw tops for added convenience. - Leak-Proof Dual Use Top : The two-piece lid incorporates an integrated carrying strap, providing a secure and reliable leak-proof seal to keep your drink contained, whether you're at the gym, in the office, or on a hiking trail. Ideal Use Scenarios : - Outdoor Adventures : Keep your water refreshingly cold during hikes or camping trips, making it the perfect companion for outdoor enthusiasts. - Gym & Fitness : Stay hydrated with your favorite drinks during workouts, thanks to the secure leak-proof design. - Daily Commutes : Bring your favorite coffee or tea to work without worrying about spills, ensuring you enjoy it at the perfect temperature throughout the day.