A photographic light tent or cube is invaluable for product photography. It allows you to light a photographic subject with soft shadows and a non-distracting background such that a photograph will look its best. It is ideal for product photography such as when you're selling things on eBay. These eggs were photographed using the light tent:
The tent is sold in a folded/collapsed shape, but when you open the package it springs open. It is very difficult to collapse back into the original shape - if you don't know the technique.
I purchased my light tent from DealExtreme here:
Many of the customer comments say that they can't figure out how to collapse the light tent for storage or transportation. Taking note of this, I was very careful when I first opened the light tent.