Etiquettes

Sitting and drinking

Q: With regards to sitting whilst eating or drinking, does this only apply to full meals, or even when one is drinking a few sips of water or fruit etc. I was in the habit of always sitting even if drinking a little bit of water, but someone told me that I don't need to sit because it's not a meal. Please clarify.

Covering utensils at night

Q:

1. I have heard that all utensils must be covered at night as sickness or evil can come down. Is this true? If things like the cap of a shampoo bottle is left open by mistake overnight, can it be used?

2. Can the crumbs that collect on the table cloth be dusted down the sink if one does not have access to a garden?