The Cool Smile
The Cool Smile might look similar to the fan-equipped cap you wore as a kid, but instead of spinning blades it uses a thermoelectric AA-powered device to draw warmth from your head into an aluminum heatsink to make you feel cooler.
The Cool Smile might look similar to the fan-equipped cap you wore as a kid, but instead of spinning blades it uses a thermoelectric AA-powered device to draw warmth from your head into an aluminum heatsink to make you feel cooler.
