You are buying 12 Ounces (by weight) of Thiourea. The item is in TWO 8 Fluid Ounce (by volume) Polypropylene bottles. Thiourea (CS(NH2)2); also known as Thiocarbamide; has hundreds of uses. 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 heat-sealed and the bottles are sealed in plastic.