There are a lot of brand names and trademarks that people tend to use as generic terms when referring to any product of that type whether it actually is that particular brand or not, but in most if not all cases there's a generic term that you should really use instead if the item that you're referring to isn't one of the brand in question.
Here are a few examples, with the generic term in brackets.
Hoover (vacuum cleaner)
Hula Hoops (potato rings (I think there's another company that calls them potato rings but AFAIK that's just a generic term))
iPad (tablet)
iPod (MP3 player)
PlayStation (games console)
Walkman (personal stereo)
There are some games that are often referred to by the best known brand name but there are also other versions of them with a different name. For example Connect 4 (companies other than MB Games use names such as Four in a Row) and Jenga (the wooden tower where you take it in turns to remove a piece from near the bottom and then place it on the top until it falls over: again firms other than MB use other names for their own version such as Topple).
I used to think breathalyser was a particular make of breath tester but I believe that it is actually a generic term.
Here are a few examples, with the generic term in brackets.
Hoover (vacuum cleaner)
Hula Hoops (potato rings (I think there's another company that calls them potato rings but AFAIK that's just a generic term))
iPad (tablet)
iPod (MP3 player)
PlayStation (games console)
Walkman (personal stereo)
There are some games that are often referred to by the best known brand name but there are also other versions of them with a different name. For example Connect 4 (companies other than MB Games use names such as Four in a Row) and Jenga (the wooden tower where you take it in turns to remove a piece from near the bottom and then place it on the top until it falls over: again firms other than MB use other names for their own version such as Topple).
I used to think breathalyser was a particular make of breath tester but I believe that it is actually a generic term.