In this video, I unbox a light tent I bought from a Chinese company on E-Bay. At the end I show examples of a product picture before and after using the light tent to diffuse my YN-560 II flash.
After I have more experience with it, I will do a demonstration and review of it. But basically you can use it to diffuse light coming from any light source: flash, continual light, sun, regular light bulbs, etc. I would be careful with work lights because of the heat though.
With the 4 coloured backgrounds, you can quickly change the background of your product photography, or you can quickly edit it out of your photo. I would have preferred a green screen colour to make it disappear, but you could easily buy or create one yourself.
Link to this product on EBay: