Keep your Milton Optima Thermosteel Flask as good as new with this genuine replacement spare lid. Specially designed for Optima series flasks (350ml, 420ml & 500ml), this standard-size cap ensures a leak-proof and spill-free experience wherever you go. Made with durable, BPA-free, food-grade material, it keeps your beverages hot or cold for prolonged hours while preventing spills. Easy to twist open and close, this replacement cap restores your flask’s original performance without needing a full replacement. Keep your beverages perfectly sealed with the Milton Optima Thermosteel Flask Replacement Lid. This premium quality spare lid is specifically designed to be compatible with Milton's 350ml, 420ml, and 500ml Thermosteel bottles, ensuring a perfect fit every time. The lid features a robust twist-cap mechanism that creates a reliable seal to prevent any unwanted spills or leaks during transport. Crafted with durability in mind, this replacement cap maintains the thermal efficiency of your flask while being easy to clean and maintain. The standard-sized lid comes with an easy-grip design that makes opening and closing effortless, even when you're on the move. Whether you need a replacement for a lost lid or want a spare for convenience, this authentic Milton accessory helps extend the life of your Thermosteel flask while maintaining its optimal performance.

• COMPATIBILITY: Designed specifically for Milton Optima Thermosteel flasks in 350ml, 420ml and 500ml capacities, ensuring a perfect fit
• LEAK-PROOF DESIGN: Features a secure twist-lock mechanism that creates an airtight seal to prevent spills and leaks during transport
• DURABLE CONSTRUCTION: Made with high-quality materials for long-lasting performance and reliable daily use
• EASY REPLACEMENT: Standard-sized lid that's simple to install - just twist to secure firmly onto your Milton flask
• CONVENIENT USE: Ergonomically designed cap with easy-grip texture for comfortable opening and closing