You are buying 24 Ounces (by weight) of Zinc Sulfate. The item is in THREE 8 Fluid Ounce (by volume) Polypropylene bottles. Zinc Sulfate (ZnSO4); also known as White Vitriol / Gungingite; has hundreds of uses. This product is non-allergenic (pure 100% mineral). Bottles are made of sturdy polypropylene. The square, “space-saver” shape ensures that the bottles fit snugly on a shelf. The wide mouth makes for easy dispensing and stackability. To ensure a spill-free journey, the screw tops are shrink wrappedd and the bottles sealed in plastic.