At first I thought "neat"!
Then I read $50! I said "Whoa!"
Then I thought, what is the benefit to a ss bottle (at $9 per bottle) over a recycled glass bottle? The glass bottle you can see if it is dirty, mine have been recycled (never bought new) for years, and were free (or $2 per with 12oz of free beer).
I own one SS growler in case I need for non-bottle (or stealth needed) locations.