Any [food] may be used to make an eruv or a shituf, except water or salt — [these are] the words of R’ Eliezer. R’ Yehoshua says: A loaf is an eruv. Even if it is baked from a se’ah but it is broken, it may not be used for an eruv; a loaf worth an issar, but which is whole, may be used for an eruv.

A person may give a ma’ah to a grocer or to a baker in order that he give him possession in an eruv — [these are] the words of R’ Eliezer. But the Sages say: His money does not effect possession. But they concur that in regard to other people his money gives him possession. And we cannot make an eruv for a person except with his consent. R’ Yehudah said: To what do these words apply? To eruvei techumin, but in regard to eruvei chatzeiros, we may make an eruv with his consent or without his consent; for we may benefit a person in his absence, but we may not disadvantage a person except in his presence.