Club Penguin has set up their innocent smoothies page. The page is only available in the United Kingdom.
There is a collector’s card for all 25 Innocent Smoothie items.
There is a page listing the unlockables, too.
There is a contest to win a trip to Innocent Smoothies. Anyone who enters (UK only) gets a free one week membership.
There is also a contest ending in March 2013 to get a free year’s supply of Innocent Drinks and 18 one year Club Penguin memberships. You also get 300 Club Penguin plush toys.
There is also a story from Rockhopper.