The Black Classic Colour Changing Lid Is A Simple Yet Innovative Solution For Adults Who Want A Practical And Stylish Drinkware Accessory. The Lid Features A Classic Design With A Unique Color-Changing Effect That Helps Indicate The Temperature Of Your Beverage. This Feature Enhances Safety And Convenience, Allowing Users To Enjoy Their Drinks At The Perfect Temperature. The Reusable Design Promotes An Eco-Conscious Lifestyle By Reducing The Need For Disposable Lids. This Lid Fits Securely On Various Mugs And Cups, Providing A Leak-Proof And Spill-Resistant Experience.