Jeff Blakely,ASLA The bowls for the flames were custom made for the project (thrown) in porcelain by a potter located in the Miami area. They were made with an opening in the base to allow the flame tip to enter the vessel. Hope this helps, they aren't commercially available, however, if you are interested in can put you in touch with the ceramicist.
Jeff Blakely,ASLA They were a custom design. Contact Winterling lighting, he fabricated fixtures out of marble also: http://www.winterlinglighting.com/Welcome.html The flame lighting
was propane brought to hand thrown 20" porcelain bowls and drilled. The potter resides in Miami and I can find the name and address for you if you want.