They’re here: the new empty Markers from Montana Colors. The classic from of American Bingo markers are now at your disposal, and can be filled with any type of ink or paint.
The material that the vessel is made of has the perfect elasticity to control the ink flow, and the felt tips are preferred by the most sophisticated writers.
There are two models available: the 30ml marker with 10mm tip, and the 90ml marker with a 18mm wide tip. The choice is yours!