Want this question answered?
water , glove
the mantle is filled rather than emptied.
A capacitor is to electricity as a glass is to water. Both are passive devices, they can be filled and they can be emptied.
A "Terrarium" would be the dirt filled opposite to an Aquarium
Grains like wheat are stored in silos. Silos are circular metal buildings that can be filled and emptied.
As martial artist's have a saying stave your greed feed your need for your foe feed there greed starve there need
a wake is followed and filled in by more of the same, such as the wake of a ship, whereas a cavity is emptied and remains empty
subs have empty tanks in them. this empty tanks are filled with water when the subs need to sink and emptied when the subs need to float.
What ever was in the cylinder had weight of its' own. When the cylinder was emptied, only the weight of the cylinder was left.