I know I won't be humping a mini-keg of beer with my backpack as Mark did this past summer. However, I did just see that Backpacker mag highlighted a new soft-sided wine carafe that only weighs 1.5 oz. and costs $9.95. A big plus is that you can squeeze out the air if you don't finish it and it stays as fresh as a new bottle. It holds 750 ml. Two please! Added to the wish list for 2013. I'll review it after first use, but wanted to post it here so I don't forget.
http://www.rei.com/product/830807/gsi-outdoors-soft-sided-wine-carafe-750ml