It's important to note that:
* Legality varies: The practice of euthanasia and the use of a "lethal cup" are highly controversial and legal frameworks vary greatly from country to country. In some places, it's legal and regulated, while in others it's illegal and considered a crime.
* Ethical considerations: The use of a "lethal cup" raises significant ethical and moral questions, often sparking debate regarding the right to die, personal autonomy, and the role of medical professionals.
If you are interested in learning more about euthanasia and the legal and ethical considerations surrounding it, I recommend consulting reputable sources such as medical and legal organizations.