Many people I know have a sieve in their sink that catches debris from plates when they are rinsed off after being removed from the table on Shabbos. Is this permitted, or is it borer?
This question deals with someone who has a cup of a drink and carries it around all day long, possibly refilling it, etc. I am wondering, for someone who drinks from a drinking fountain every time he ...
What is the proper use of a blech/plata on Shabbat?