I like to use a 2.0 liter hydration bladder. I've always wanted to put it upright, aligned with my spine towards the bottom of my pack, but this always created an irritating lump, preventing the pack from lying flush with my back. As a result I end up plopping the bladder on top of all of the other contents in my pack. This is convenient for refilling the bladder but can make the pack kind of top heavy.
I was wondering how others carry their hydration bladders and the best solutions y'all've found for packing them
I hope all is well out there.