What is the emphasis on Guanyin's pure bottle downward?

When offering a statue of Guanyin Bodhisattva with a clean bottle at home, the clean bottle in the hands of the main bodhisattva should stand upright in the hands of the bodhisattva. If the clean bottle is placed horizontally or downwards, the owner will leak money.

The bottle can only be cleaned if it is not marked with the zodiac sign of the righting person (the zodiac sign of the day is marked on the yellow calendar).

For reference.