OK... Because I'm sort of a gear nut, and bottle stuff has been on my brain lately, I admit I think the canteens are sort of cool. I like the double-walled idea.
BUT, I think that even at 50% off they are quite overpriced. I'm not keen on the small capacity, and as someone mentioned, the carriers remind me of llittle purses.
But who am I to really knock the US Canteen stuff? Just this past week, I broke down after about a year of looking and fondling, carrying around the store and putting back... I finally bought a 20 oz SIGG flask with cup. Yeah, yeah... It is only 20 oz, but for me the added nesting cup put more utility into the package. It's sort of like a smaller, sleeker version of the USGI canteen and cup. I figure I can use the SIGG combo in a small day hiking kit, and/or give it to the boy to use when he gets a little older.
The flask and cup are stainless steel. The flask does have a flat bottom on it and will stand on it's own. But for use around fire or in coals, I'd probably prop it up with some wood to insure it doesn't tip over. I made tea in the flask yesterday. Water + tea bag + sun for a while.