I have now been using this travel box for 4 weeks. The concept is great, an empty box into which you can insert plastic whole or half pans to fill with your choice of WC paints. And the idea of having spare pans filled with colours which can be swapped around for different painting palettes is really clever. Unfortunately the pans do not fit snugly leaving room at sides of the pans where paint can spill underneath. And they 'rattle around' in the metal palette. I am still looking for my 'perfect palette'!!