Expertly designed for functionality and sustainability, the Black Ferns Stainless Steel Drink Bottle is a must-have for any active lifestyle. This 540ml bottle is made with double walled stainless steel, ensuring your drinks stay hot or cold for longer periods of time. The BPA-free materials provide a safe and clean drinking experience, while the flip straw lid allows for easy and convenient sipping. Perfect for any beverage, from the gym to the office. Hand wash only