[Tagging] man_made=storage_tank for open containers?

[Markus]

Hi list,

Does a man_made=storage_tank need to be closed? Or do we have (or
require) a tag for open containers, for example open slurry storage
containers [^1]?

[^1]: <https://commons.wikimedia.org/wiki/File:Don%27t_jump;_Haddon_House_Farm,_Bakewell_-_geograph.org.uk_-_1264500.jpg>

Thanks

Markus