Water Bag

I started with 2 water bags (1 of 1 and 1 of 2 liters) from
Platypus
but now swear by this brand. Not just for my water bag but check my preference regarding burner and water filter.

MSR or too Mountain Safety Research so.

I now make do with 1 2-liter water bag because that means I also always carry 1 liter of hot water in my Thermos bottle.