Have you ever filled a chia pet? Well, let me tell you that the hole in the top is tiny. At my work desk, a wet chia pet was a nuisance.
This design is still in progress, but the colorful version has a series of 1.75mm channels in it to accept raw chunks of various filament in colorful styles. This is a design idea I’m playing with to set my single color prints off AND use up some filament scraps!