You might not find as many chocolates in that last-minute Valentine's Day gift box as you did last year — blame 'slack-filling'

• "Slack-filling" is the practice of over-packaging goods to make them appear more full. 
• Federal regulations prohibit slack filling, but some claim its happening with Valentine's Day candy, the Washington Post reported. 
• Valentine's Day candy prices have gone up nearly 10%, according to the Post. 

Valentine's Day candy prices are up nearly 10%, but that doesn't mean you'll be getting more candy in your heart-shaped box of chocolates, according to a report by The Washington Post.