Lastolite's new Studio Cubelite is a perfect solution to product photography.
The Studio Cubelite allows lighting from underneath whilst the diffusion fabric means the reflections on even the most reflective surfaces are kept to absolute minimum.
The front opening on the softbox can be closed to mask reflections from the camera too.
As well as the Cubelite, the kit comes complete with 2 tungsten lights plus stands, softbox and all the relevant reflectors.
There's 2 different sizes - 70cms (28") or 100cms (39") depending on what you need.
See Lastolite for further details.