What is the ruling on pouring tea and coffee down the drain, and is it permissible to dispose of expired milk with other waste?

It is not permissible to discard edible food remnants into drains or with trash, as this constitutes a desecration of blessings. Such food must be preserved, fed to those in need or to animals, or placed in a prominent, respectful location for those who need it to take. As for spoiled or unusable food, there is no harm in discarding it in the trash. Fruit peels may be discarded in the trash, but edible parts, if placed in the trash, must be put in a dedicated bag.