We all know those unsung heroes in our lives—those who plan the trips, remember birthdays or always make the grocery runs.

Food is a great souvenir. Years ago in London I came across packets of chocolate-coated cookies made by Cadbury that I could stuff into my carry-on bag.

Cadbury has unveiled a quirky new line of Dairy Milk chocolate bars that aims to solve the age-old squabble over who gets what share. Far from your standard chocolate, these new bars are designed ...