TWSBI Ink bottle, 1791 Inks 18ml series Prairie Green ink

Limited fountain pen ink line 18ml of fountain pen ink in a frosted glass bottle. The series name 1791 comes from a famous book written in 1791 in China, called 'The Dreams of the Red Chamber'. In English, the names just describe the color of the ink, but in Chinese, they come from 6 famous buildings described in the book.