Does drinking a cold drink several minutes after eating cold non-kosher food render the cup non-kosher since it is making contact with the mouth, which may still have remnants of non-kosher food in it? Does the answer differ if the cup is glass?


1 Answer 1


If a not-hot kosher vessel came in contact with not-hot non-kosher food, the vessel should be very thoroughly washed with cold water and scrubbed to remove any remnant of the non-kosher food before resuming kosher use. (Shulchan Arukh YD 121:1)

  • I am by disrupting your way to define the "off topic". I do not see why this is good while that of onion cut by a knife Chalavi is not.
    – kouty
    Commented Feb 25, 2016 at 20:00
  • @kouty I might be the guilty one here as I edited the question to make it less of a request for psak and more theoretical. I then realized (in chat) that this is best not done. Learning for me. On the other side, I am now really interested in the answer on the other one with all the points you surfaced!
    – mbloch
    Commented Feb 26, 2016 at 4:26
  • @mbloch I am trying a plastic surgery on the question about onion but the initially Girsa disappear. please see the begining I wrote and paste the initial question bellow if you are technically able. Thanks ;)
    – kouty
    Commented Feb 26, 2016 at 4:34

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