"RJ" wrote in message
...

I've always thought that stainless steel
was impervious to corrosion.

Recently, I was gifted with an engraved "hip flask".
On the bottom, stamped "Stainless Steel"
right next to the "Made in China " imprint.

The enclosed papers warn;
"DO NOT store any liquids in this container
for more than four days ! After that, drain, and rinse."

What aren't they telling me ?

I don't intend to work thru a flask of brandy every four days......

Stainless steel ??

If you can't drink a flask of brandy in four days, you're an amateur.

But seriously.

Dairy products have a restriction that ALL their piping and anything that
comes in contact with milk has to be a certain metallurgical designation, I
think 304, but I could be wrong.

Anything made is subject to corrosion, even pure gold. There's something
that can dissolve it.

Club Aluminum cookware was the rage in the sixties and seventies. But if
you left a pot of spaghetti sauce in it, the acetic tomato sauce would chew
on the aluminum. Same thing with MagnaLite cookware, a magnesium alloy with
aluminum.

When in doubt, RTFM.

Steve