High Density Polyethylene Plastic Wide Mouth Water Bottle 16 Oz with Cap. FDA approved food grade HDPE plastic does not change the taste of any beverage contained inside. The water tight cap prevents accidental spilling. At 6.57 inches (167 mm) tall and 2.83 inches (72 mm) in diameter, the 16 Oz (500 ml) water bottle is easy to hold in one hand, and not too heavy when full.