JJC FC-26B Flash Diffuser for Canon 430EX II Speedlite (White).
Tilt flash / speedlight at 45-90 degrees to create Diffused Bare Bulb Effect.
Giving even coverage across the entire frame, with lenses from 15mm to 200mm in the 35mm format (equal in other formats as well). Easy to use and goes onto and off of your flash in seconds with custom fitting, and No Velcro.
Designed for years of service without the bulk of some other diffusers, it is small enough to fit easily into your gadget bag or pocket.