Amazon offers the Aveeno Baby Calming Comfort Lavender & Vanilla 18-oz. Bath Wash for $5.12. Add it to your cart with Subscribe & Save to cut it to $4.86 and bag free shipping. That's about $4 less than buying it from a local store. It purports to help calm babies before bedtime and soothe skin.
Be sure to cancel Subscribe & Save once your order ships to avoid being billed for subsequent shipments.