Stainless Steel Ice Cubes

Anyone have any luck using these things?  Anyone know where to get them cheap?.. decent ones at least?  My Chef Central (gourmet cooking store) has them, but they are 4 four $18 which seems nuts.
 
Steve

I have not tried the stainless ones, but I have a set of the stones.  They work good if you want to drop the temp of your beverage by about 5*.
 
A quick Amazon search found a lot of options.  There is a set of 4 for about $12 shipped, a set of 8 will run you about $25.

Thanks for the heads up!