These are great for all bags that I have tried. They can easily be stored in the utensil drawer
They truly do work, if you make sure to fold the bag with a good crease. I use them on all my cereal bags, snacks, and frozen food bags. The Gripstics get easier to use as you get the hang of them. If the bag is wider than the actual Gripstic, I fold the bag width to match the width of the stic. These have worked wonderfully on all the bags I have tried, thin and thicker.