These are the best bags to use!  I started using them because my apartment complex allowed dogs and had these bag dispensers on posts so when you walked your dog they were available.  They were such a high quality, that I now buy my own supply.  Nice and thick so you don't worry about leakage, the other bags that come in rolls are so thin not only do you feel what you're picking up but you also see it through the bag.  These Mutt Mitts are a solid color so you don't walk around showing the world what you're carrying on the way to the trashcan.  And they hole a LOT, so for big dogs you don't have to use two bags.  Purchasing these in the box is much more cost effective then buying them in the 30 count at the stores.