You could also use this dish as a serving piece since it is food safe. I recommend hand washing for all of my glass pieces.
Soap shown is "Island Inlet Salt Bar" from sunbasilgarden. Find them here - http://www.etsy.com/shop/sunbasilgarden
Using a full size commercial soap bar like Ivory? Check out the larger sizes in this section: http://www.etsy.com/shop/bprdesigns?section_id=7170098
Have any questions? Contact the shop owner.