Sampo

Sampo is a brand of artificial fruit seen in "Happy Anniversary." D.W. wanted to eat some, but Arthur couldn't open it without a can opener. It was later discovered that the cans are made of tin- the very thing that D.W. was searching for through the whole episode.

Trivia

 * Acidic foods, such as pineapple, corrode tin. Not only is the fruit artificial, it is probably also contaminated. Then again, it is artificial.