The Hydro Flask Insulated Standard Mouth Sport Cap is a versatile water bottle accessory designed for athletes and outdoor enthusiasts. Made of durable polypropylene material, this screw-on lid features insulation properties to keep your drinks cool for longer periods of time. With a sleek black color and the iconic Hydro Flask branding, this cap is perfect for both men and women who enjoy staying hydrated during sports activities or hiking adventures. Additionally, the United States-made product ensures high quality and reliability for all your hydration needs.