At the moment all I can think of is some of the medicines.
Example: Wal-mart has a store brand called Equate which has many different products, they don't manufacture all those medicines. They get the from the same place as the companies who put out products like Aleve & Immodium & Advil. Most of the time the products look exactly the same, color & size, just different stamps on them.
We even had one of the managers in Sams club confirm this.