Markets in everything

Banana guards:

Are you fed up with bringing bananas to work or school only to find
them bruised and squashed? Our unique, patented device allows for the
safe transport and storage of individual bananas letting you enjoy
perfect bananas anytime, anywhere.

The Banana Guard was specially designed to fit the vast
majority of bananas. Its other features include multiple small
perforations to facilitate ventilation thereby preventing premature
ripening and a sturdy locking mechanism to keep the Banana Guard
closed. The Banana Guard is of course dishwasher safe for easy
cleaning.

Here is the link, and that is via BoingBoing, thanks to Jason van Bruaene for the pointer.

Addendum: Here is an extension of the first idea.