19824 Roller Eel Đen 4.5 oz /Kèm bút RB

The free rollerball pen paired with this 4.5 oz bottle is a nice bonus, but the ink itself is the real star. It flows smoothly and the bulletproof, archival quality gives me peace of mind for anything I need to last.

I've been using this ink for my daily journaling and the waterproof claim is no joke—spilled a bit of water on the page and the words didn't budge. The included rollerball pen is a nice bonus too, and the 4.5 oz bottle feels like it'll last me a year.

The bottle is huge for the price, and having the free rollerball pen included makes it a great starter set. The ink flows smoothly and dries quickly enough for everyday note-taking, and I like knowing my writing will stay permanent.