This must be printed at 100% infill of course, but any material will work. For experts only, do not use/try this at home. Fountains are as easy as the next thing, but must be prepared with care.

Designed with a ½" fountain tube in mind, but must be scaled to fit the tube you plan to use anyway- my “safety” feature for those who don't know what they're doing and didn't read this description.