Smart Cup Coffee Extraction Principle | How to correctly use the Smart Cup to make hand-brewed black coffee? Who is Smart Cup suitable for?

I believe that many friends will easily get headaches when faced with different brewing methods every day. After all, you need to accurately weigh the water injection for each section and pay attention to the circling technique. You need to pay attention to so many details in just two or three minutes. No way, let’s be a little lazy today! What is suitable for such "today's troubles"