Vargo bot HD (titanium nalgene) - replaces my 32oz nalgene and cook pot - I run this in the nalgene side pocket of my bag with a mixed drink during the day.
3L bladder with quick connect - main water source
Befree filter on 3L hydrapak with quick connect - I'll switch to the hydrapak filter next season because I heard good things.
I'll squeeze the filtered hydrapak directly into my bladder using the quick connect to refill. And have extra water in the hydrapak for cooking dinner and hot drinks.
The vargo bot is 1L, so I can boil enough water to rehydrate my meal and make coffee or apple cider. During the day I can use it for supplements like electrolyte powders.
In freezing temps I'm carrying the vargo bot with a warm beverage in the side pocket, and a lightweight nalgene in an insulated cozy inside my bag.