Hmm, what else do suppose may be distilled with that little unit? Wasn't aware that such small distillers were out there. I've read a lot about vodka dosing but could never figure out why anyone would waste perfectly good vodka on their fish tank. Now if this little distiller could.....

Cheep ones may, but expensive ones would get away from copper. as for how much copper you would get into the distilled water I woudl say it would be nothing to worry about as the copper is usaly the cooling side not the heating. the heating surface would be the same in that little one as your kettle.

Steve