50 ml (or cm3) - to the edge
25 ml (or cm3) - to the indented interior line
I quickly designed this scoop today to measure the required ammount of gypsum and water for a casted architectural model. With a 3D printer in the house, you start looking at things differently: "why try to look for something in shops? It takes less to design and print it!". So that's what I did and this is the result. Worked quite nicely for my purpose. I hope it is of use for you too!
Best printed with 0.4mm walls, as the thicknesses of the scoop wals and handle are 0.8mm.
Make sure you use supports for surfaces above 45-60°, depending on your printer, filament, settings etc. If not, the top part (or the bottom of the hemisphere) will print partly in air, which might affect watertightness.