This 21oz vacuum tumbler features a 304# recycled stainless steel inner and a 201# stainless steel outer with PFAS-free coating. Its innovative dual-use lid and easy-carry handle offer ultimate convenience. With double-wall vacuum insulation and copper lining, it keeps drinks hot for 8 hours and cold for 12 hours. Compliant with FDA, BPA-free, and Prop 65 standards, it's a safe, eco-friendly choice for daily hydration. Perfect for Office Workers, Commuters, Students, Gym Enthusiasts, Outdoor Events, Picnics, Road Trips, Corporate Branding, Promotional Giveaways, Retail, Eco-Friendly Lifestyle,Trade show eco product.