The Perka Portofino 36 oz. Travel Mug is a fusion of eco-conscious design and practical elegance that not only satisfies your hydration needs but also aligns with a commitment to a greener planet. Both outer and inner walls of the mug are made of 90% post-consumer, 18/8 premium stainless steel and the double wall construction keeps your favorite drinks hot for 12 hours and cold for 24 hours. Designed for style and comfort, the mug features a color-matching silicone drinking straw for pleasurable sipping and the soft silicone handle grip provides secure and comfortable grip whether you're commuting, hiking, or simply on the move. BPA Free and FDA Compliant. A portion of all proceeds is donated to Shelter to Soldier^™, a non-profit organization that rescues dogs to train as service animals for veterans in need.