A product that has definitely grabbed my attention lately has been the Dyson bladeless fan. I'm not only interested due to the fact that they are $300 fans, they are just really cool. The fan is made up of a hollow tube on top, with a base below that. The air that comes out of the fan is actually pulled through this base, and runs up into the tube of the fan. This tube acts like a ramp, and the air runs along this ramp and eventually is pulled to the front of the fan where the air is pushed out like any standard fan. One would expect these fans to be very noisy, which they were at first, but the second generation of these fans were made to be much more quiet. They added Helmhortz cavities in the newer designs, which allowed them to be more able to control the noise coming from these fans. These cavities are used in the engines of some cars in order to quiet the exhaust of the car. They effectively muted certain sounds that would come from the fan. Overall, these fans are something I'd be very interested in owning, if only they weren't $300 for a small desk fan.