Features: Keep your beverages at the perfect temperature with this portable flask cover made from food grade Plastic. This thermos cover is suitable for cups with a mouth diameter of 4.5cm/1.77inch and is convenient to use. Suitable for outdoor enthusiasts and individual who frequently travel, this flask cover ensures that your drinks stay hot or cold for extended periods. Whether you're hiking or commuting, this flask cover is an essential accessory to maintain the temperature of your drinks. Enhances your flask with this quality plastic lid, offering a secures seal and easy access to your favorite beverages. Specifications: Material: Plastic Style: Original small switches/internal threaded switches Size: As shown in the picture Suitable for bottle mouth diameter: Approx. 4.5cm/1.77inch Package Includes: 1x Vacuum Flask Lid note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.