I just finished a smaller version of the Doctor Bag from the Knit 2 Together book
This is made using less than 3 hanks of Manos del Uruguay. Modifications were:
-Used yarn single-stranded, rather than double-stranded. This resulted in finished dimensions of 13.5" long x 5" wide x 7.75" high. Compare this with the original dimensions of 19.5" x 6.75" x 10.5".
-Made the herringbone pattern a 24-row instead of a 16-row repeat
-Omitted the rods at the top of the bag, since they were not needed for a bag this size
-Made the seams on the inside rather than the outside
-Used interfacing to add stability
-Cut the front, bottom, and back lining all together as one piece, leaving only the side lining pieces that needed to be seamed
More info at http://soknitpicky.blogspot.com/search/label/dr%20bag
Thanks so much for looking!