Today's daf is sponsored by Jane Shapiro in honor of Nina Black on her birthday, from her Machi who loves sharing grandchildren and children and daf yomi together.  Can one break a barrel on Shabbat? Can one make a spout? Can one perforate the cover of a barrel? Can one use a reed or a branch to make a spout? Can one open a hole that was sealed up? On what does it depend? Can one seal a hole with wax? With oil? To what extent did Rav go to respect other rabbis even though he was a more prominent rabbi than they were?