Universal Can-Cooling Lid Prototype

I need a working physical prototype of a reusable lid that locks onto every common drink-can size—Red Bull, Monster, Pepsi, Coca-Cola, and anything in between—using a single twist-and-lock mechanism. The most critical feature for me is leaving enough internal volume and thermal interface for an integrated cooling system that will eventually hold the liquid between 2 °C and 4 °C. Even in this first build, the housing geometry, heat-sink clearance, and battery compartment must be accounted for so the electronics can drop straight in when I am ready. The look I am chasing is minimalist and functional: clean lines, no visual noise, but still robust enough for daily carry. The body should be food-grade ABS, the seal a food-grade silicone ring that stays airtight to keep carbonation in and spills out. A low-profile digital LED on the top will show drink temperature, battery level, and cooling status; please recess it so it sits flush with the surface. I also want a molded loop that accepts a small stainless carabiner so users can hook the lid to a backpack or belt. Key work involved: • Mechanical design (CAD in SolidWorks, Fusion 360, or similar) for the universal locking collar, silicone gasket channel, battery bay, and LED window • Material selection and sourcing for food-safe ABS, silicone, and any transparent lens material for the display • Rapid prototyping—3-D print, CNC, or low-volume injection—to deliver a fully assembled, testable unit • Basic waterproofing tests for the seal and fit tests across the full can range (250 ml to 500 ml) • A short video or photo set proving the prototype fits each can size, survives a shake test without leaking, and shows the LED powering up (mock data on the screen is fine at this stage) Acceptance criteria: 1. One physical prototype shipped to me, ready for fit-and-seal testing 2. Native CAD files plus manufacturing-ready STEP files 3. Bill of materials with suppliers and food-grade certifications 4. Assembly instructions and any firmware stubs used to drive the LED demo If you have experience with thermoelectric cooling modules, PCB layout for compact wearables, or consumer beverage accessories, please highlight it—it will help when we move to the next development phase.

Project ID: 40556093