Made of high-quality stainless steel. It has a single wall high-quality steel body. Basically 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 traveling also. This bottle can be used by anyone in your o 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 drinks.