Wanted a little Hiking pack 
Made a little hiking pack
You might like it, or not
 
6" wide x 5.25" deep x 13.5" tall, more or less
 
Two versions:  One has a 1"ish taper at the top and the other does not.
 
Water bottle pouch is made for a 16.9oz generic bottle.  Might fit yours but probably not