Another of my (and I am guessing many of your) ever changing gear systems. Water, and how to carry it, drink it, pour it, etc. Tell us what you use, weight, and perhaps most importantly, explain why you settled on each choice.
For late fall-early spring (November-March) overnighters I currently take:
1 Brämhults 1 liter plastic bottle, 47g. Took me a while, but finally found a good #2 type plastic bottle to recycle as my water bottle. I have read several sources (you are welcome to google this) that #2 plastic is safer to re-use, plus I am okay with the weight penalty for having a sturdier/tougher bottle, and that is also easy to pour/drink from.
1 Titanium 200ml mug, 37g. For hot drinks, plus 101 other uses (scoop snow, melt snow, bowl to eat oatmeal, pour water into bottle, etc). I love this mug and it comes with me nearly always.
Total weight: 84g or about 3oz.
I have a big section hike coming up in late April, and plan on taking:
1 Platypus 1 liter bladder, 25g. This is my clean water cache. I don't drink from it or put my mouth on it, only for filtered or purified water go in it.
1 Brämhults 380ml plastic bottle, 25g. This is my drinking bottle, same tough and safer #2 plastic, and small enough to be easy access in my chest bag. Also where I can mix drinks, like powdered energy drinks, vitamin pills, etc. if I want and not gunk up or contaminate the rest of my clean drinking water.
1 Sawyer Squeeze 1 liter bladder, 20g (I think, someone correct me if I am wrong here). "Dirty" water cache. If there is a stretch of trail with limited/no water sources (rare here in Sweden, but does happen) I can use this to carry an extra reserve of water to filter later on.
1 Ti mug, 37g, see above. Also makes filling the Sawyer bladder much easier at water sources.
Total weight 107g or about 3.9oz
What about you?