Gallon Size This hypoallergenic shampoo contains Baking Soda, a proven cleanser and deodorizer which absorbs and fights odors while washing away ground-in dirt and unwanted oil. Its exfoliating action gently removes dead skin cells while exposing softer, smoother skin. The formula also contains Colloidal Oatmeal and Aloe Vera, two soothing ingredients that help calm redness and reduce inflammation. This soap-free formula is excellent for use with all spray-on and spot-on insecticide products. Makes up to 11 gallons.