Possible Clues:

• Memento from tower, small, not genuine, defaced
• It has sentimental value
• Souvenir Japanese bar will do?
• Look up Eastern wine -- it enhances the memory
• Look up drink in Japan as memento
• Hold on to Oriental drink as memento
• Souvenir from 'Tower Tipple'
• Remembrance
• Thing retained in memory of giver