Baltra Fridge water bottle is made of high quality stainless steel. Food-grade stainless steel is used in the food, brewing and wine-making industries so it does not rust, corrode, retain or impart a taste. No matter how many times you refill it, and no matter what you put into it, this bottle will keep your drink fresh, crisp and clean tasting. It is used to keep in the freezer/Refrigerator but apart from it you can use it anywhere like office, home, kitchen and in the travelling also. Baltra Fridge bottle can be used by anyone in your family and you need not to worry about the changing temperatures when you are using the water bottle. This bottle specially designed for cold liquids and beverage. This product should not be used for carbonated drink.