The flask is perfect. Although it's a bit utilitarian in design, it's still quite nice-looking. Super durable, almost impossibly so for it's weight and thickness. Nice brushed finish - not slippery, but not too sticky. Threads are fine and grippy. Contains enough alcohol for a small party after a day of hike for 2-3 persons. Slips into almost any pocket as it's small and thin and square.
I'm a huge fan of classical hip-flasks in aluminium with mirror finish, but this one kind of beats those in every aspect. And if you plan to buy a Stanley "durable" monstrosity - just save some money and space - buy this one instead!