Pochi silicone pen case. I use a Japanese fabric roll case to house my 9 nicest fountain pens, but wanted something smaller to carry in my purse. This comfortably fits 3 fountain pens and would probably fit more, but 3 is a good number to carry. Comes in colors that I found a little too eye-searing, plus black won't show dirt. Rubbery, suede-like silicone is durable and feels nice.