A cupful of water once a month would be sufficient to prevent unsealing of traps.
It is as if one has so much water in a basin; if one person takes a cupful out, there is that much less for the others.
Reporters were persuaded to carry buckets of electrolyte fluid from patient to patient and try to get them to drink cupfuls of the liquid.
After decoction, the herbal tea was taken internally a cupful at a time.
