Making a brand so popular it becomes a generic term is every marketing person's dream, but can also become a nightmare. "Genericisation" is the ultimate marketing accolade, a sign that a household name has universal appeal and is the go-to in its field, but it can also lead to the dreaded "genericide", when a brand loses identity and distinctiveness, not to mention its trademark. Click or scroll through 60 brand names that, for better or worse, have ended up as generic terms.