People very strongly emphasize eating the entirety of an eruv tavshilin on Shabbat (some even designate an honoree to eat the eruv). No one I have ever heard of, however, ensures that an eruv ...
I have heard (and daf yomi is reinforcing the impression) that an eiruv depends on two things: the boundary, and that there is some sort of communal food that is shared by those in the enclosed ...
An eruv allows Jews to carry within a semi-public space on Shabbat. The space must be bounded by walls and must meet several detailed requirements. The eruv must consist of food for a meal for the ...