321 STRONG 500 mL (16.9 fluid ounce) Aluminum Water Bottle, Black, Silver, Red, White, or Blue BPA / BPB / Phthalate free construction with attractive body color Durable aluminum metal construction suitable for the gym , sports , kids at school Carabiner sport clip and split key ring allow you to attach flask to nearly any object Screw top black lid with silicone ring is leak proof and kid proof Stop using plastic water bottles , and make the eco friendly choice with this reusable canteen bottle