PENtastic CxPO Tester Folded Pens ( Buy Now )
These folded pens are designed to fit the small sample vials that are hard to get into. They hold a lot more ink than dip pens and produce much more expressive lines. They are also super easy to clean - a dip in water, a shake, a wipe and you are ready to move on to the next sample (or bottle :-)
These pens fit any standard straight holder and can be ordered individually or as a set of 2 nibs (in different styles).
Here is a short video showing the pens in action
These can be ordered from the online store here: PENtastic CxPO Tester Pens
...and here are some more pictures 'cause we (ok me!) love pictures.