This 40 oz thermo-drilled bottle cover offers excellent insulation and is ideal for traveling, camping or everyday use. Its unique design is custom-fitted for 40-ounce water bottles, ensuring a perfect fit and effective heat retention. This kettle cover is made of high-quality thermo-drilled material, which has excellent thermal insulation properties and can maintain water temperature for a long time. Whether you are enjoying hot drinks in winter or cold drinks in summer, it can maintain the ideal temperature, allowing you to enjoy delicious drinks anytime and anywhere. Its portable design allows you to carry it easily without taking up too much space. Whether hanging in the car, on a backpack or in a handbag, it can be easily carried to meet your drinking needs anytime, anywhere. In addition, the design of the kettle cover takes into account the anti-slip function, which is not easy to slide and is more stable and reliable. You can use it with confidence that it will remain stable even during sports or outdoor activities. Overall, this 40-ounce thermo-drilled bottle cover has excellent thermal insulation performance, portability and stability, making it an indispensable partner in your life, bringing you a convenient and comfortable use experience.