You are buying 1 Pound of Monosodium Phosphate. The item is in 2 polypropylene bottles. Monosodium Phosphate (NaH2PO4), also known as Sodium Phosphate Monobasic, 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 shrink-wrapped and the bottles sealed in plastic.