These ready-to-use Shipping Container Pools are being sold in Australia but are also available in the UK and South Africa under different brands.
The Shipping Container Pool is an all in one design with a deck at the one end that contains both the stairs and child safety door. The filtration system is housed underneath the deck that is accessible through the original shipping container door that is lockable. The fiberglass pool with generous steps and benches with a child safety ledge around the perimeter starts from the deck and runs the full length of the shipping container.
Options range from $20 and 30k