i'm grammatically incorrect

at work, on a lot of the marketing materials produced before i came into the picture the phrase "contains no water" shows up. for some reason, it seems really wrong to me. maybe it's the placement of the negative. i personally think it should say "does not contain water". my boss, who's first language is not english, thought the same as i did but was told otherwise. nope, it should say "contains no water". hrmm. so i googled it. lo and behold.. "contains no water" is more widely used than "does not contain water" (according to google). heh. i still think it's wrong.