Ah! updated and awesome! Imagine our delight when we found our paints fit perfectly in the Kaweco vintage style boxes! We paired one of their delightfully skate sports nib pens with our awesome new travel brush, and when we cut the insert we were able to fit 6 paint stones perfectly, all nestled with our waxed fabric packaging of 'bee. Pens (and all new Kaweco pens) come with a cartridge upside down and inserted into the pen cap! It can be quite tight and hard to see, but it's in there!