*Milk:
Milk is associated with the Moon and nurturing. Donating it when the Moon is already weak in the 6th house might deplete one's own emotional reserves and ability to nurture oneself.
*Water:
Water is also linked to the Moon and emotions. Donating water could symbolize giving away one's emotional stability and adaptability, which are particularly important for navigating the challenges of the 6th house.
*Silver:
Silver is a metal associated with the Moon. Donating it might weaken the Moon's influence on one's mental and emotional well-being, potentially leading to increased anxiety or instability.