Keilim19: 10
מַשְׁפֶּלֶת שֶׁנִּפְחֲתָה מִלְּקַבֵּל רִמּוֹנִים — רַבִּי מֵאִיר מְטַמֵּא, וַחֲכָמִים מְטַהֲרִים, מִפְּנֵי שֶׁבָּטַל הָעִקָּר — בָּטְלָה הַטְּפֵלָה.
[Regarding] a mashpeles-container that became too damaged to hold pomegranates, R’ Meir rules it tamei. But the Sages rule it tahor, because [when] the primary [function of a utensil] is disabled, [its] secondary [function] is [considered] disabled [as well].