Polymer Engineering Graduation Innovation

I need a unique and innovative graduation project idea in Polymer Engineering. The product must:
• Be new and unexpected, not directly available in the market.
• Be a practical item for daily life that immediately captures attention (a “wow” factor for both professors and students).
• Be made 100% from polymers only (no metals or other materials).
• Use one of the following as the main material: PP, PS, PE, or PVC, with any additives allowed.
• Be practical, useful, and marketable, not just a temporary display.
• Be realistic for a university project—not too large or industrial, but also not something trivial or pre-made.

I want a clear concept with detailed implementation steps, explaining how the product can be designed and manufactured using my available lab equipment:
• Arburg injection molding machine
• Carver compression molding machine
• Collins blown film extruder
• Collins twin screw extruder
• Collins two roll mill W110P
• BOY 60 E injection molding machine
• Melt flow rate apparatus
• Capillary rheometer
• Ceast multi-weigh MFR

The final idea should balance creativity, feasibility, and clear manufacturing steps.