This is a bag I made to carry large projects in when I take them to a quilting bee.
The outside is made from 6 fat quarters sewn together in a 2 x 3 grid. Then, line the inside. I lined mine with a very colorful fish fabric.
Add elastic to the sides that are made from 3 different fat quarters. Use a nice, wide elastic, but make sure it has a lot of give.
Then, I put a fabric drawstring through each of the sides that is made from 2 different fat quarters. I just tied the ends of the fabrics in a knot. That way, you can easily adjust the length of the straps or change them out if you ever need to.
It doesn't look all that big, but it can hold a lot. In the photo, it's holding a queen size quilt, quilting hoop, and a box of sewing supplies.
This bag makes it much easier to carry those big projects around.