I think that's meant for more of a 10 yard dumpster. Heavier steel, but at the end of the day they aren't as big as the sea/land containers. The containers are dangerous to use as in ground shelters as they lack the support to retain the soil. Several have collapsed by people doing this.

It will be a pond, but will be sealed from inside with a torch on lining. Only cutting a portion of the top open, and burrying it about 90% in the ground to aid in equalizing the outward pressure of the water, and the inward pressure of the soil. For the techies...I know it's not "equal" but it's a hell of a lot more "equal" than freestanding on top of the ground, which would force me to spend a fortune in bracing.
Now back to the subject.
The soil is the insulator, and keeping the top on reduces heat loss, but also minimizes evaporation. I built a prototype and it worked well.
Similar designs are in use outside Vegas for shrimp farming...seems I am always just a little bit behind on things. Anyway, I reviewed those, found things I think could have been done better or at least better suited to me. Modified the plan/construction and utilized my understanding of differential pressures from offshore work and commercial diving school.

Geodesic green house will go over the top to help balance thermoclines, and container water volume should work as a heat sinc.

But I am a one man operation, wife is not impressed with my PIA projects. (PIA...Pain in the.....)

Almost time to pick up this years prawn juivies....this year is getting ahead of me.