This listing is for one (1) gallon of PURE CHEMISTRY 100% Pure All Natural Deionized Water. Ideal for various laboratory, industrial, and medical applications requiring high-purity water. This deionized water is perfect for rinsing lab equipment, diluting solutions, use in humidifiers, automotive applications, and more where mineral-free water is essential. The product comes in a convenient 1-gallon (128 fl oz) plastic jug with a secure cap.