The one I know about is the Penvelope 6 by Franklin Christoph, and I am wavering as to whether to buy one now for a trip I have soon so I can carry *six* fountain pens with me instead of *four* (my current case), but are there others I should be considering? I'm currently using a cheaper case I bought off eBay, but I've been pretty pleased with it other than longing for more capacity. The largest pens I'd be carrying are a Nakaya Naka-ai and an Edison Pearl.