There was an interesting article in the 2008.07.18 evening edition of the Nikkei Shimbun. It mentioned some of the measures taken by various food companies to be more environmentally friendly.
Seven Eleven - thinner plastic bags
Asahi Beer - less aluminum in beer cans
Nissin Foods - ramen cups from resin/paper
Ezaki Glico - thinner boxes
Suntory - less material in PET bottles
Morinaga Milk - thinner glass bottles
Nippon Ham - thinner film on sausages