Amazon has the 16-count Ivory Original Bath Size Soap Bars, 4 oz. for $3.99 - 5% off with Subscribe & Save (can cancel at anytime) - $0.30 off coupon (click "Clip this coupon) = $3.49
with free shipping. You must do Subscribe & Save to order this add-on item without the $25 minimum order requirement.
Dye- and perfume-free.