What happens when you open a can of Tangerine Altoids, shut it again,
and leave it in the cupboard for five years?
Tangerine Altoids are a type of candy known as a "sugar glass," like fruit Lifesavers or Jolly Ranchers. This type of candy is hygroscopic, which means it absorbs water from the atmosphere. The Altoids in my tin absorbed enough water over five years that some of the candy liquified and puddled at the bottom of the tin.