Which scientific instrument's launch included a demonstration where its inventor publicly drank water contaminated with cholera-causing bacteria to prove its effectiveness?

The launch of scientific products can transform research, medicine, and our understanding of the world. Some product launches in science have become legendary moments that marked turning points in human progress. Test your knowledge about the dramatic debuts of game-changing scientific tools and technologies that revolutionized their fields.

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The Pasteur flask for preventing microbial contamination
The Chamberland-Pasteur filter for water purification
The first microscope by Antoni van Leeuwenhoek
The PCR machine by Kary Mullis