The DrinkTanks Growler is quite the growler. It come in a sturdy case with a handle, and it's cast with a high-quality 18/8 stainless steel. It's encased in a double-wall vacuum insulation and holds 64 ounces. Because of the double-walled insulation, it will keep your beer cold for 24 hours--yes, HOURS--and will keep coffee steaming hot for 12 hours.
And if you're worried about leaks, don't. The growler has a double-ball locking system that keeps the container leak-proof when you're moving around.
The DrinkTanks 64oz Growler runs at $68.95, but if you're looking for a less-expensive alternative, you can always try a Kegworks stainless steel beer growler for around $27.