hahaha nothing beats chemistry humorbo and luke dukes best moonshine comes straight from old uncle jesse's UV sterilizer...best in hazard county!!!
Most distilled water now a days IS RO/DI water. And if you do find steam distilled (Wal-Mart with purple lable) it might be 0 TDS, but boiling water doesn't remove phosphates, or other solubal substances, and the copper thing that JDW mentioned.