The pepper grinder can contract tumahcontamination as three utensils: as a receptacle; as a metal utensil; and as a sieve.

Three matters R’ Elazar ben Azaryah permitted, but the Sages prohibited: His cow would go out [into the public domain] with the strap which is between its horns; we may curry an animal on Yom Tov; and we may grind peppers in their grinder. R’ Yehudah says: We may not curry an animal on Yom Tov because it may make a wound, but we may curry with a wooden comb. But the Sages say: We may not curry them [with an iron comb], and we may not even curry them with a wooden comb.