Here's a convenient way to ensure you always have a bag close at hand when needed. Made from flexible silicone, the 2" diameter pod is designed to hold two tightly folded regular plastic grocery bags (or eight dog waste bags) and has a 4" chrome-plated steel chain to let you attach it to a loop or handle.
Comes with one reusable plastic bag. You'll appreciate it when travelling or for those spur-of-the-moment trips to the store. Various colors, depending on supply.