@Ty johnson I bought these from Greenhouse Megastore.
They are called Conetainers. Sold for growing seedlings, etc. You can buy the conetainers and the frames. The frames hold 98 per a 12x18 in area which allows me to keep a lot in a small footprint. They have two sizes, I went with the smaller 7in. Perfect cuttings, because I can individually pickup each one.
Of course for Bonsai I will take them and repot to spread the roots horizontally before next spring. But during the rooting stage the nice long cone is perfect.