Bottled wine, 40% of its package weight is in the bottle. Boxed wine a mere 4%.
Wine bottles were invented centuries ago before technology and modern chemistry advancements, so why like the incandescent bulb, why use a clearly ineffective and dated technology. Most people prefer the glass wine bottle for the handling and look. Why did we quickly switch from glass milk bottled to plastic or paper containers, but resist doing so with wine bottles. Simply image.
See all the pros/cons of bottle vs boxed wines on the recent Green Blizzard: Environmental Benefits of Boxed Wine.