Key Features Lightweight Insulation: Uses AeroLight spun-steel technology, making it 33% lighter than standard stainless steel bottles. Fast Flow Lid: Features a leakproof, wide-mouth design with a smaller drink opening built right into the cap for quick drinking and easy cleaning.Temperature Retention: Employs double-wall vacuum insulation to keep drinks cold for 24 hours and iced for up to 4 days.Portability: Equipped with a flexible, easy-carry rotating handle that integrates a cap holder.Eco-Friendly: Constructed from 90% recycled 18/8 stainless steel and is entirely BPA-free.