I want to turn an idea into a compact, travel-friendly toothbrush that’s fully biodegradable, without compromising brushing performance or aesthetics. The core tasks include shaping an ergonomic form factor that packs neatly into a carry-on pouch, selecting environmentally safe materials that can withstand moisture and daily wear, and engineering a closure mechanism that keeps the bristles hygienic while in transit. Here’s how I picture the workflow: • Early-stage sketches exploring folding, telescopic, or snap-together silhouettes. • 3D CAD files (STEP or IGES) refined for injection-mouldable biodegradable polymers—or an equivalent eco-friendly process you recommend. • Photorealistic renders demonstrating colour and surface finish options suitable for shelf-ready presentation. • A short manufacturing note highlighting material specifications, draft angles, suggested wall thickness, and any steel-safe design considerations. Acceptance criteria • Overall length in travel mode must stay under 12 cm. • All visible parts specified in biodegradable materials; no conventional plastics except where absolutely necessary for structural integrity (justify if used). • Brush head should accommodate standard soft bristles or bio-based filaments and meet typical ADA head size guidelines. • All deliverables supplied in native CAD format plus export files, with renders at 3000 px minimum. If you have experience designing consumer health items or have previously worked with compostable resins like PLA or PHA blends, your insight will be invaluable to ensuring manufacturability and sustainability.