Made of food grade plastic, non-toxic, thicker plastic will provide upgraded shock resistance for bottles. The dust cap can also protect the internal liquid from any contamination and is safe for the human body. The lock design can securely lock your hat when you are not drinking. The built-in leak proof sealing ring allows you to place the bottle in different directions, and the liquid will be locked inside without any leakage issues, just easy to use. Equipped with a hand rope, it can be easily hung on a bag or carried for easy storage. It is very suitable for use in offices, gyms, schools, cycling, travel, hiking, or other indoor and outdoor activities.