The heat is on, and delivery drivers know it. A creator has 3D printed a horseshoe-shaped neck ring from TPU that hides internal channels. Inside, an aluminum rod that has been cooled in the refrigerator is inserted. The result is a collar that lowers body temperature without getting wet or dripping. Simple, practical, and ready to use.
Internal channels and TPU: how the cervical heat sink works 🧊
The piece is printed in flexible TPU, a material that adapts to the neck and does not irritate the skin. The internal channels have a tight diameter to house an 8mm aluminum rod. When taken out of the refrigerator, the rod acts as a passive heat sink: it absorbs body heat through the TPU and transfers it to the cold metal. The horseshoe design allows air to circulate around the neck, improving the thermal sensation without relying on batteries or fans.
The invention that will make your boss give you a weird look in the truck 🐴
Yes, you will look like a racehorse with a luxury neck brace, but when August arrives and the asphalt is at 50 degrees, you will laugh at what people say. The best part is you don't need plugs or ice: just a worksite fridge or the one at home. And if anyone asks, tell them it's a high-performance thermal device. Or that the physio prescribed it. It works just the same.