I have made a lot of flash diffusers in the past, using anything I could get my hands on, from old milk bottles to marscapone pots. They all do a great job, but they don't last 2 minutes when out in the field. I saw this old Apple Airport laying around at Nottingham Hackspace and it immediately hit me that it would make a great solid long lasting flash diffuser.
The results are great, heres how to make your own.
Step 1: Remove the internals.
The white plastic around the ports is a separate piece, but is held in place with one of the screws. So easy to add back in later.