【COLD WATER UP TO 8 HOURS】: Its double-wall construction and hermetic seal keep liquids hot for up to 12 hours, or cool for up to 8 hours. Taste your drink at any time of the day, perfect for your daily activities or travel 【Unique Design】: The flip cover is designed with a safety lock and is equipped with a silicone sealing ring, which is dust-proof and leak-proof. Open with one hand at the click of a button. Comes with a removable straw for easy assembly and cleaning. You can use a bottle without a straw. The wide opening is easy to fill with ice and clean. 【Ideal Size for Carrying Anywhere】: The size is no more than 18cm, put it in a bag or backpack without worries. It's just as practical as a traditional thermos, and its lid is shaped to prevent spills of any kind. 【SUPER DURABLE AND ECO-FRIENDLY】: Made of food grade 304 stainless steel, it provides years of service life and well-being for your health. Its durability and incredible sturdiness allow you to use it without worrying about wear and tear. Get rid of plastic bottles and contribute to a cleaner world 【Stay Hydrated When Away From Home】: Its 400ml capacity gives you the perfect amount of water, juice or drink for various activities. Stay fresh and energized at the gym, school or office. Available in a variety of bright colors, this bottle is an ideal gift for yourself, friends, family and colleagues who enjoy a healthy lifestyle.