The Optimal Stainless Steel Vacuum Flask (480mL) is a lightweight thermal travel thermos specifically engineered to preserve the exact temperature of both hot and cold beverages for extended periods.

Product Features & Thermal Performance

• Double-Wall Vacuum Insulation: Built with advanced thermal technology that eliminates the air layer between the stainless steel walls. This prevents heat transfer, ensuring hot coffees or teas stay hot, and cold water or juices stay chilled for hours. 
• One-Touch Locking Lid: Features a pressure-operated push-button cap integrated with a secure mechanical flip lock. This prevents accidental spills or leaks, making it perfectly safe to toss inside travel luggage, school bags, or diaper packs. 
• Baby-Safe Materials: The internal lining is crafted from high-grade, food-safe stainless steel. All plastic framing and gaskets are 100% BPA-free and certified safe for baby formula prep or child use. 
• Ergonomic & Lightweight: Designed with a sleek profile that ensures a solid, non-slip grip while remaining lightweight enough for easy everyday handling