Works perfectly with the Preppies, and very cool looking in them too! I love using my Wa with bottled ink, it makes me feel very fancy at an affordable level. I will warn anyone else whose Preppies have taken forever to saturate their nibs/tended to hard start that after my first filling, my nib was completely soaked and I had to blot it multiple times after, but it was a pleasant change of pace and not a flaw of the product by any means---just be prepared with something to clean the nib instead of expecting to set it right back down on the table or your paper!
