I went on a trip, brought a couple of flasks. The nicer one was filled with cask strength corn from Balcones. Probably still made in China, but higher quality flask than the second. The cheap flask was purchased at Academy (a sporting goods store that covers much of the South) and filled with Vodka. I washed it with PBW (Powdered Brewery Wash) then soap, using hot water, many times and hot rinse. When I went to pour it the vodka (about three weeks later) it was grey. Academy did not approve my comment for the product review on their website, buyer beware.
Now I'm going to make you watch my vacation pictures...

There you go, True Blue with two continents in the same picture. The "Blue Mosque" in the background. Didn't bother with a photo of the grey vodka.