There are many products that have become so common to consumers that we don’t think about their real meaning when we say them. For example, people often say Kleenex instead of tissue, or simply Coke instead of soda. The name for the process of an item becoming so colloquial it is referred to by a brand name is called proprietary eponym.
Some good examples of these are escalator, which was simply called “moving stairs” until Otis Elevators released their own product and named it escalator, which then stuck. Heroin got its name because the Bayer Company marketed it as an over the counter drug under the trademark Heroin. Their product was so popular that it just caught on, and today we don’t even think that there were once other brands of Heroin!