Flickr member potatomato posted a photo set on how he made a flash diffusor from a plastic take-away container.
He writes:
The Gary Fong Lightsphere is a flash diffuser that is gaining popularity with wedding and portrait photograhers world wide. His product is selling at a pace that the manufacturer can’t keep up with. This Flickr photoset demonstrates the use of a to-go container to make your own.
View photo set on Flickr
Via MAKE Blog