The snail cooler

It's amazing how a simple DIY heat sink can improve thermals. This snail-looking Raspberry Pi performs much better than the stock version thanks to a very plain aluminum ribbon. "I used fevicol which is a synthetic craft glue as I don’t have proper heat sink paste. But I found that fevicol glue works good and the heatsink stays quite firmly attached to the CPU. After placing the heatsink the CPU temperature never goes above 50 degrees celsius. Which is a 10-degree improvement.

Source: EXASUB