This is yet another illogical and bizarre idea that wants to hitch a ride on the eco-friendly and sustainable markets wagon, when in reality, it would far more eco-friendly to just melt down the shipping container and produce another one from the metal.
The core challenge we are facing is that we produce way too much "stuff" for a rapidly-expanding global population.
The very act of capitalism in today's world dooms the human race due to resource usage (look at all the extra crap installed on the "shipping container"), pollution and carbon production, so if you're making or selling anything non-essential, no matter how your marketing department repositions it as environmentally-friendly
, you are a big part of the problem.
But hey, we all gotta eat right? So nothing will change, other than the methods of marketing, such as portraying a shipping container being loaded with up lots of extra plastic, metal and paint to make a pool, as being "eco-friendly". Nope, they're just trying to sell more pools to the eco-fools.