This is a mold for a heart shaped planter. There are 3 files, the top, bottom, and modifier. The modifier is optional, but I used it to make the top area see through to avoid over filling. I printed the bottom mold using vase mode.

To see how much casting material I was going to need, I assembled the mold and filled it with water. Then took the top off and marked the height of the water on the inside of the bottom mold. I then filled the mold with casting material to that line, inserted the top, and put a heavy can on top to keep the top from floating up.

It does take some effort to get the cast out of the mold.