@WBDaddy and @tbbuc I'd like to thank you both for helpful insight on the subject.
Went back and forth on which way to handle the shipping cost. But I personally prefer that when I get to check out the price I saw is the price I pay, vs going to buy a case of diapers only to find out its going to cost another 20-30 bucks to ship.
As our product line grows with more unique diapers we will be able to work out an even better deal with our manufacturer and pass the savings along to the customer.
As a sneak peak there are plans for a rewards program where you earn points on purchases that can be used for discounts, faster shipping, or special prizes that wont be available for sale.