Got given a few boxes of liquor chocolates a month or so ago. Didn't pay any attention to how they were stored.
Had a few stinking hot days - the liquor has evaporated from the centres and the chocolates have imploded.
They still taste alright - but lack the kick that they would have had originally.
Note to self - in future, scoff chocolate as soon as you get it. Don't put it away for a rainy day.