I am looking for a waist pack. Need it to be around 200 cubic inches (probably no smaller than 180 and no larger than 240). Having either a main compartment divided into at least 2 sections or having two main compartments is a must; having additional pockets is a plus, especially a flat one in the front or back that is just about big enough to carry some documents like a passport. Having two side pockets/pouches each big enough to hold a 1-litre nalgene bottle is also very important. Any suggestions?