Annoyed by using one-time sponge brushes I created this sponge brush clip to avoid waste as much as possible.

Supplies

3D printer

PLA

rubber band

household sponge

Step 1: Assembling the Clip

Print the two pieces, rafts and supports are not needed, I used standard PLA with a 0.4 mm nozzle and 0.15 mm layer height. Join them with a rubber band of your favorite color as displayed in the photos. A small rubber band with around 30 mm diameter wrapped around three times worked well in my case.

Step 2: Preparing the Sponge

Cut a standard household sponge as shown in the pictures. I found a small bread knife is best for this. Use scissors to form the tipp. You can clean used sponges in the dishwasher and re-use them as sponge brushes.