Addendum: the bowl and lid are dishwasher safe ... just tested.
Update 2: I use the cup 2 times a week, I can share the following experience: After filling the shell with the units, 2-3x easily stir the outer ring after 2-3 hours, so that the salt well mixed with the water , The increased hatchability clear. Because I once had the misfortune of these are virtually no crabs hatched. Since I umrühre the outer ring, slip it all.