I don't use Nalgene bottles, which are heavy. I use 1-quart Smartwater bottles (which slip into and out of pack pockets easily) plus a 2-liter Evernew bladder for camp water. Platypus has a similar bladder; either is about a third the weight of a 1-liter Nalgene.
I don't use a cup, either. I drink water directly out of my personal water bottle. For hot beverages (mostly tea) I drink directly out of my cooking pot.
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey