Amazon Prime is a program that Amazon offers usually as a paid service. You are eligible for FREE two day shipping on anything that is labeled “Prime” (which is most things). Combine this with the 30% off Subscribe and Save sale on diapers and wipes and you can score some incredibly cheap diapers and wipes.
They are offering 3 months free to Moms, Dads or caregivers of children in general. Go sign up!