Costco, or diapers.com? Seeing as diapers.com delivers them (free shipping over 50) to your door, I’m considering just buying my diapers from there from now on, because I’d hate to buy a membership to costco just for diapers, and I doubt that if I go in there I will just by diapers. But then I heard that diapers.com pampers are a different quality than store pampers. I don’t know if that is true but i’d hate to find out first hand.