Gen-tle men :) few questions about flasks

I also want to add one more, and then I'm done because I annoy myself.

I read that flasks made out of two pieces of metal, and connected with sheet metal will leak at the seam. Naturally, of course; cheap is cheap.

Since I took the cover off my fleabay find, I noticed a line of brown along the one edge III something like that. I take that to mean that there's iron in the flask, and also a seam that will someday split and leak.

Being that I don't want my pockets soaked with gin, could anyone recommend a flask that is

1) Lined - these are hard to find and don't seem to exist. Something between the metal and the liquor so taste doesn't mix.

2) Non-reflective: Fingerprints bother me, as do noticeable scratches.

3) 8oz.

I know there's got to be some BOTL out there who uses a flask and loves it.

Help is, as always, appreciated.

Kegan