If you don't know what to do with those annoying plastic grocery bags, read on!
Don't want to purchase trash bags, use plastic grocery bags for small trash cans, by tying a small knot in one or both handle ends and by stretching the bag over the lip of the trash container.
Use larger knots for smaller trash cans. To improve the appearance, fold the excess knotted ears under the trash container lip to make everything look nice. Once the trash is filled, remove the bag and tie the two bag handles together to form a sealed trash ball for easy disposal.
Store used plastic grocery bags for use later. Wrap the plastic bags into small knots for easy storage. Follow three steps: The first step is to fold and twist the bag into a long rope. Next, fold the bag 'rope' in the middle.
Finally, make a simple knot out of the whole thing. The bag should look like a little ball. Use an old sock to store dozens of these bags for instant use later.