Premium 30 oz double-wall insulated stainless steel mug with vacuum seal technology for maximum temperature retention (hot 12 hrs/cold 24 hrs). Commercial-grade 18/8 stainless steel construction resists rust and odors while being BPA-free. Ergonomic flip lid with secure locking mechanism prevents spills during commute, outdoor adventures or office use. Laser-etched graduated markings allow precise liquid measurement for bartending, meal prep or fitness tracking. Mirror-polished exterior with sweat-proof condensation control maintains sleek appearance. Compatible with most cup holders and dishwasher safe for effortless maintenance. Ideal for construction workers, travelers, gym enthusiasts and busy professionals requiring durable all-day hydration.