LIGHTWEIGHT & LEAKPROOF FOR EVERYDAY COMMUTES: The Transit Flip Top Mug is 33% lighter than standard stainless steel bottles, thanks to AeroLight spun-steel technology. Slim, secure, and built to move with you—perfect for daily commutes and travel. ALL-DAY TEMPERATURE CONTROL: Double-wall vacuum insulation keeps drinks hot for up to 6 hours, cold for 12 hours, and iced for up to 35 hours, so your beverage stays at the right temperature from first sip to last. FLIP-TOP LID FOR SPILL-FREE SIPPING: Leakproof flip-top lid lets you flip open, sip, and lock shut with confidence. Designed to prevent spills in bags, backpacks, and car cupholders. DISHWASHER SAFE & EASY TO CLEAN: Made with 18/8 recycled stainless steel, this vacuum-insulated mug is fully dishwasher safe. Clean easily at home and be ready for tomorrow’s commute or next adventure. BUILT FOR LIFE: 'Built for Life' has been the Stanley promise since 1913, manufacturing rugged, high-performance products that last a lifetime.