PORTABILITY REDEFINED: Optimized for your commute, the AeroLight Transit Bottle is the ultimate travel companion. It’s made with Stanley’s featherweight spun-steel technology, making it 33% lighter than our standard stainless steel drinkware. • SUPERIOR THERMAL PERFORMANCE: With stainless steel vacuum insulated double walls, drinks stay hot for 6 hours, cold for 8 hours, and iced for up to 30 hours. Making the last sip of water, coffee, or tea as good as the first. • NO MORE LEAKS: You’ll love the locking, drink-through lid that keeps leaks at bay. Looking for a stainless steel water bottle to keep by your side as you drive? The slim profile slips into most car cup holders to keep you hydrated on the road. • BUILT FOR LIFE: Lifetime warranty guaranteed.