A lantern that has a receptacle for oil is tamei, while if it does not have [such a receptacle] it is tahor. A potter’s form which he begins with is tahor, while [the one] which he finishes with is tamei. A funnel of householders is tahor, while that of peddlers is tamei since it is used for measurement; [these are] the words of R’ Yehudah ben Beseira. R’ Akiva says: Since he tilts it on its side and allows the buyer to smell [its contents].