Kuretake's Sumi Ink 60 comes in a 60 ml bottle and is best suited for illustrations and comic work. Note that once the ink is dry, it is not waterproof but it is smudge-proof.
Brause EF66 Nib
Brause Steno Nib
EF Principal Nib
Elliholi Brush Lettering Worksheets
Finetec Coliro Watercolor - 6 Colors Pearl Set