It's hard not to admire the simplicity. This device is a modernistic funnel that is made of plastic and stainless steel with rubber outside for placing the device snuggly in the wine bottle. And it does work as advertised; I used it for quite a while. But in this device the aeration occurs with 4 ports on a single plane inside the device. While that will perform some aeration, and will make your wine taste better, other devices have come along that improve upon this. Still, it is my backup aerator and does fit nicely in the glove box or picnic hamper, ready at a moments notice.
A better choice might be:
