Fifty Cent Bag

Well, 50c was for the pillowcase - the thread and my time are extra.  Basically, you slice a pillowcase on the diagonal

 

tidy up the raw edges

flip one triangle around, and sew together.

 You then tie the pointy ends and voila - a bag!!! I was happy with the result in general, but found it wasn't long enough to be comfortable under my arm.  I saw the idea on line and just wanted to try it - and now I have!!!