Possible Clues:

• Look to turn foreign booze into evocative memento
• Hang on to Japanese wine as memento
• Getting souvenir from Gatwick's terminal: go back with Japanese drink
• Item kept as a reminder
• Retain alcoholic drink as memento
• Memorable possession
• Hold on to Japanese wine as a memento
• Reminder to stock Asian wine?
• What Japanese bar will do for souvenir?
• It acts as a reminder to store alcoholic drink