This is an amazing multipurpose liner.
Simply put any ink, diluted watercolor or acrylics in the well. Then start writing or painting! This will not drip or puddle. It will flow only when it comes in contact with a surface.
You don't need different ink or calligraphy pens any more.
Note- Wash with soap and water after use, if the ink dries in your pen, it will clog. To unclog the nib, a cleaner needle is given.
See this Video on my Instagram on how to use: Video