More Discussions for this daf
1. Avraham Avinu cooked for Nochrim 2. Two Shmuels or One 3. Raba bar Rav Huna
4. Pesach 5. A Raven flew by 6. Army of Nochrim
7. Rav Avia 8. The Chumra of Raban Gamliel 9. Graf Shel Re'i

Avraham Sacks asks:

Ravina said we cannot purposely make a Graf Shel Re' but if we invited a Jewish guest or drank wine ourselves we would intentionally be making a Graf Shel Re'i, so what is different about the leftovers in the non Jew's cup?

Avraham Sacks, Ramat Beit Shemesh

The Kollel replies:

Dear Avraham,

There is only Graf by the leftovers of a non-Jew since the wine is forbidden to use and therefore Muktza. Jewish wine and leftovers is not Graf since it can be used by chickens.

All the best,

Reuven Weiner