I'm afraid that (32 oz) is the maximum possible with this small backpack, that's why several ways of purification, including a quick one, as our first (gathering) bug out location is on a small creek, and the way to the second one is along that creek too. Each of us will have some in the backpack (just calculated - it will be a bit over a gallon total).

For the blanket, we are used to have more clothing on than necessary. Also my DW knows how to use the space blanket properly (add insulation, prevent condensation - very cozy).