Compact 550 ML Hydration Capacity: The Dublin Ruff & Tuff 550 ML Stainless Steel Vacuum Flask is perfect for staying hydrated on the go. Its convenient size fits easily in backpacks, gym bags, or office desks, making it ideal for travel, workouts, or daily use. Double Wall Vacuum Insulation: Engineered with advanced double-wall insulation to keep beverages hot or cold for hours. Enjoy chilled water during workouts or warm drinks at the office while maintaining the ideal temperature longer. Premium Stainless Steel Construction: Made from high-quality, rust-resistant stainless steel that is durable and odor-free. The sturdy design preserves the natural taste of beverages without flavor transfer, ensuring reliable daily use. Leakproof Flip Lid Convenience: The secure flip lid allows easy one-hand drinking while providing a tight, leakproof seal. Carry it confidently in gym bags, backpacks, or travel kits without worrying about spills or mess.