Grab the copper heatpipe + fan from any dead laptop.
Add a $7 Peltier TEC1-12706 from Amazon.
Wire to 12V phone charger.
Result: fridge that cools drinks to 4°C in 8 minutes.
Holds 6 cans, runs whisper quiet, costs under $15 total.
Thousands built this exact project in 2025 — zero new parts bought.