Mishnah Kelim 2:5-6

Sugya Map

• Core Issue: The threshold of "vessel-hood" (keli) regarding earthen vessels (klei cheres). Specifically, the tension between functional utility and structural integrity in determining susceptibility to tumah.
• Primary Sources: Mishnah Kelim 2:5-6; Sifra, Shemini, Parsha 12:4; Tosefta Kelim Bava Metzia 2:1-2.
• Nafka Minot:
  • Functionality vs. Form: Does an object’s status as a keli depend on its primary design or its secondary utility (e.g., a lid used as a colander)?
  • The Toch (Interior) Requirement: The necessity of a beit kibbul (receptacle) for klei cheres vs. the legal status of "covers" that are repurposed.
  • Fragmentary Status: The definition of shibrei kelim (broken shards) and the minimum volume required to retain legal relevance.

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Text Snapshot

• Mishnah 2:5: "The following are not susceptible to impurity among earthen vessels: A tray without a rim... A cooking vessel that was turned into a bread-basket cover... The following is a general rule: any among earthen vessels that has no inner part is not susceptible to impurity on its outer sides."
• Leshon Nuance: The Mishnah employs the term beit kibbul (receptacle) as the sine qua non for earthen susceptibility. Note the progression: from the kelim proper to the shibrei kelim (fragments), and finally to the kisuyim (covers). The transition from "not a vessel" to "a vessel" hinges on hachsharah—the intentional adaptation for a new, functional use ("Im hitkinan l'kabel").

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Readings

Rash MiShantz: The Derivation of Exemption

Rash MiShantz (commenting on s.v. Kisui kedei yayin) anchors the exemption of lids in the textual constraints of Leviticus 11:33 ("b'tocham yihyeh"—in their midst it shall be). He cites the Sifra: “Could I include covers of vessels? The verse says ‘in them,’ excluding covers.”

The chiddush here is the absolute nature of the exclusion. Rash notes that even if an object physically possesses a cavity, if its primary definition is that of a kisui (cover), it is legally "flat." The tumah of klei cheres is uniquely tethered to the toch (interior volume). If the design intent is to cover rather than contain, the halacha ignores the physical capacity. This creates a binary: either an object is a keli with a toch, or it is an accessory (tashmish) which, by definition, lacks the toch required to transmit tumah through its airspace.

Rambam: Functionality as the Arbiter of Reality

Rambam (Hilkhot Kelim 18:5, commentary on the Mishnah) focuses on the "potter's intent" and the "user's adaptation." Regarding the kisui ha-lifs (the pot lid), Rambam explains that if the lid is not pointed and lacks a hole, it becomes tamei—not because it was manufactured as a pot, but because the user has repurposed it to drain vegetables ("l'sano no m'mayim").

The chiddush of Rambam is the fluidity of status. Unlike wood or metal, which may retain keli status even in diminished forms, earthen vessels are brittle—physically and legally. Once broken, the vessel is tahor. However, the moment a woman uses a broken shard as a strainer, it undergoes a meta-halachic transformation: it is no longer a "piece of trash"; it is a "vessel for draining." Rambam posits that keli-status is not merely an ontological category defined by the manufacturer, but a functional one defined by the user’s utility.

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Friction

The Kushya: The Paradox of the "Strainer"

The central kushya arises from the treatment of the kisui ha-lifs. If the Mishnah establishes that a cover is inherently tahor because it lacks the status of a "receptacle," how can a simple change in use (draining vegetables) override its fundamental status as a kisui? If the Sifra excludes covers categorically, why would the incidental act of draining fluid re-introduce tumah?

The Terutz: Intent vs. Essence

One might answer via the Tosafot Yom Tov (2:5:3): the dispute between R. Eliezer bar Zadok and the Sages regarding the "draining" lid is not about the definition of the object, but about the permanence of the use.

1. The Functional Terutz: When an object is used to drain, it ceases to be a kisui (a cover) and becomes a mesanenet (a strainer). The Sifra's exclusion applies to an object in its capacity as a cover. Once the object is removed from that role and serves as a vessel for processing food, the exclusion vanishes.
2. The Structural Terutz: The kushya assumes that "cover" is an immutable label. However, in Kelim, status is tethered to shimmush (usage). If the lid is designed with a concave shape (not pointed), it is "latent" vessel-hood. The act of draining is merely the "trigger" (gilyon) that reveals its inherent potential to be a vessel.

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Intertext

• Leviticus 11:33: The source of the toch requirement. The Gemara in Chullin (24b) and Kelim (2:1) consistently maps the tumah of earthen vessels to the "airspace" (avir). The contrast here is with klei etz (wooden vessels), which, under certain conditions, can contract tumah even without a toch if they are large enough to hold objects (see SA YD 199:1).
• Responsa (Maharil): The discussion in Kelim regarding the "tray without a rim" is echoed in later poskim regarding modern kitchen implements (e.g., baking sheets). The halacha follows the principle that keli cheres requires a beit kibbul that functions as a container for storage or processing. A tray that cannot hold liquid (or "oil sufficient for anointing a child’s finger") is treated as a flat surface, not a vessel.

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Psak/Practice

In practical terms, the Mishnah serves as the foundational rubric for determining the susceptibility of "non-obvious" kitchenware. The heuristic is:

1. Does it have a beit kibbul? If no, it is tahor.
2. Is it a kisui? If yes, it is tahor unless adapted for a primary function (like the strainer).
3. Is it a shard? If it cannot hold the minimum volume (the oil for a child’s finger), it is legally non-existent.

In contemporary meta-psak, this teaches that "vessel-hood" is not an static property but a relationship between the object's geometry and the user's necessity.

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Takeaway

Klei cheres are defined by their capacity to hold; if the design (or the repurposing) facilitates containment, the law imposes tumah. The tumah of the earthen vessel is a direct reflection of its utility: if you use it to hold, it is a vessel; if you use it to cover, it is nothing.