Blowgun Mouthpiece/cup

I noticed that nobody had a blowgun mouthpiece designed on here yet so I decided to make it my first contribution. I have two designs here one with a cone shaped bowl and one with a sperical bowl. Blowgun mouthpieces I consider an important part to making any blowgun. And usually particularly hard to fabricate without a lathe.

I modeled this with FreeCad, because it's free, runs on Linux, Mac's, and Windows. Theoretically I could also model this with freescad so that It's customizable, bu