You are buying 1 Pound of Disodium Phosphate Anhydrous. The item is in 2 polypropylene bottles. Disodium Phosphate Anhydrous (Na2HPO4), also known as Sodium Phosphate Dibasic, 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.