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 bar shown for demonstration purposes only is from Luster Canyon here on Etsy. You can find them here: http://www.etsy.com/shop/lustercanyon
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.