WATERBOX Square Tritan Water Bottle BPA free plastic that is totally safe to use. The SoftTouch Cap is easy to grip and turn and with the asymmetrical shape requires little force to open and close. Also with the reinforced finger loop you can safely secure it. The bottle has a large opening so you can add ice, drink mixes and easily clean your bottle. The shape was designed to fit comfortably in your hand and not roll away from you when you set it down. 100% Recyclable