Replenishes body moisture and stays active. Hydration is essential to maintaining a healthy lifestyle. No matter you are at home, outdoors, school, office, gym or camping, running, fitness, etc. In summer, you can store cold water in our water bottles to cool off. In winter, water cups can be used to store hot water to protect against the cold. The silicone ring in the lid prevents leakage. Narrow mouth cola bottle, don't worry about water leakage when drinking by car/train/boat/bus or plane.