Big Plant Watering Bulb/Ball V3 Bewässerungskugel für Blumen

Update 19.05.2020

gielium uploaded a make of this and reported it was printed watertight on the Ender 5 with an overall extrusion multiplier of 130%. For more details check out that make.
Cheers!
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This is the big sister of this design: https://www.thingiverse.com/thing:2950840
I made it some time ago but didn't publish it yet because I couldn't manage to print it airtight