I took one look at this picture and just have to make one of these really cool bags right now. Or maybe 2 or 3.
1 24 inch US #7/4.5mm circular needle
1 24 or 30 inch US #10/6mm circular needle
Worsted weight cotton or cotton blend yarn:
[MC] 2 balls
[CC1] 1 ball
[CC2] 1 ball