123D (free CAD software by Autodesk)
123D Make (free slicing software by Autodesk)
CorelDraw or Inkscape
Laser Cutter (a shopbot or waterjet would also work) I used a 120W Epilog Legend 36 EXT with a 36"x24" cutting bed
Hot Glue Gun
Wide Masking Tape
Sandpaper (Coarse & Fine)
Paint (to use as a sealant) like Acrylic base or Polyurethane
Stick-On Mirrored film
Thin copper tubing
1/2 cup of table salt
High-temperature black stove paint
1/2 inch metal conduit pipe
Rubber tubing. Use high-temp stuff if you plan to use it for a long time.
Step 1: Is it Possible?
How big of a mirror is that?
That was a lot bigger than I could make, but it gave me an idea of scale. For example, if I could wait 1 minute instead of 15 seconds for my cup of water, I only needed a 4-foot dish. In the end, I decided to make a 36" dish because that was the biggest I could make on my laser cutter without slicing up my support rings into smaller pieces (which is certainly an option.)