Fed up with chaos around my kitchen sink, I designed and 3D-printed a storage tray for my cleaning supplies. It features three compartments for sponges or scrubbing pads and a stand for a bottle brush. I printed this in black PLA, which is probably not a great material choice or technique for long-term kitchen use (FDM-printed plastics have a rough, striated surface finish which probably encourages the growth of bacteria) but I'm considering this a successful prototype for now. I may continue experimenting.