Pepsi Max contains zero calories but as some Swedish consumers recently found out, it packs quite a punch. That's because thousands of cans of the soda were mistakenly filled with booze.

Carlsberg Sweden says it's investigating how factory workers could have mistakenly filled the cans with Xide Citrus Fizz, a soft drink containing more than four-percent alcohol. As a result, thousands of cans of Pepsi Max have been recalled from a large supermarket chain