http://www.seekinghealth.com/lactase-drops-lactase-enzyme.html
Learn more about Lactase Drops here

Lactase Drops by Seeking Health saves this family $3.00 per gallon. Learn how to use Lactase Drops and allow it to sit in a gallon of milk which makes your own reduced lactose milk!

lactase

Source: Lactase Drops by Seeking Health Saves Us $3.00/gallon