Premium 20oz/30oz stainless steel tumbler with advanced vacuum insulation for 12-hour temperature retention. Features a patented leakproof flip straw lid with one-handed operation, perfect for travel, commuting, and outdoor activities. Commercial-grade 304 stainless steel interior resists odors and stains, while the sweat-proof exterior maintains condensation-free grip. Ergonomic handle design ensures secure carrying during driving or hiking. Precision laser welding creates seamless double-wall construction for maximum insulation. BPA-free materials meet FDA standards for food safety. Ideal for office use, road trips, gym sessions, and daily hydration needs. Custom powder coating provides scratch-resistant durability with stylish matte finish.