‘Fair Use’ is the term that describes a particular trademark in a film stating that it did not violate any laws by being in the film. The laws state that you can use a trademarked product or symbol in a film so long as you’re not misleading the audience when it comes to its application and its purpose. The law also states that a trademark is fair use if it’s not implying to the audience that it was responsible for the making of the film. The sum this all up, if you want to use a trademarked product in your film, you are within your legal rights to do it so long as the consumer can buy the product and that it is being used for it’s intended purpose in the film.
Also check out this article about using branded items in your film and what should be aware of when it comes to WORKS OF ART.