TheTangoCBC: Kleenex maker says famous tissues to be wiped out of Canada soon, citing 'unique complexities'
It’s called a genericized trademark. There’s plenty, including aspirin and heroin.
It’s also common to call these Kleenex in the US.
ShakeThatYamI heard that in the South every carbonated beverage is a Coke. However, I don’t understand how this works practically. If you wanted a Sprite, would you order a Coke-Sprite?
It’s more like of someone asks if you want a soda, they would instead ask if you want a Coke. You would then ask what kind they have. If you want a specific type at a restaurant, you would just say the kind you wanted.
This is the best explanation of this phenomenon that I think I’ve ever heard.