Photo Gallery: The Pesky Liquid Ban 11/18/2008
 The ban on liquids larger than 100 milliliters on products that haven't been...
AP

The ban on liquids larger than 100 milliliters on products that haven't been purchased at the airport has been a huge boost to the duty-free industry. Germany's duty-free market leader, Gebr. Heinemann, saw its sales rise by 15 percent over the past two years.