41.39 You often can not fill partially filled container with water

[Faalagorn]

It seems that for partially-filled containers you often don't get an option to pour into or fill from taps etc. You can only fill them by putting them on rain or pour/drink some from it and then when it's emptier, it can be filled.

 

There are also some odd rounding errors with the floats being involved. I kinda wish the system would be less sophisticated and just used unit for water containers (i.e. cup = 1 unit of water and then other containers multiple of it, similar how taps have)