Kids Basix stainless steel drink ware were created in response to the growing body of emerigin scientific evidence about the dangers of toxic chemicals used to make many plastics. Stainless steel is used because it is clean, stable, and durable. Because stainless steel is stable and inert it does not interact with the foods and fluids it comes into contact with. So what you put in you get out. This bottle is BPA and phthalate free, dishwasher safe, comes with a mud cap, has an easy pull spout and has a wide neck and coaster base.