Mishnayos Keilim Perek 25 Mishnah 7

בית הצביטה (that part of the vessel by which it is seized, handle, neck, cavity for the fingers) – We have the reading [בית הצביטה ] )whereas the Mishnah has the reading of "בית הצביעה"). It is the place where we hold the vessel, when we move it to and fro. It is the language of (Ruth 2:14): “He (i.e., Boaz) handed her roasted grain, [and she ate her fill and had some left over],” whose meaning is that he handed to her. And there are those who have the reading "בית הצביעה", the place where one holds it with his finger.

ויש להן בית צביטה – if the backsides were defiled, the place of the handle is ritually pure. But if the handle became defiled, its backsides are ritually pure.

לערבה גדולה של עץ [(the distinction in the outer parts applies] only in a large wooden trough) – it has a part of the vessel by which it is seized. But not with the rest of the vessels. That the large trough has a separation between the place where it is seized and its backsides, that if there are liquids on the backsides of the trough and his hands are impure, he holds on to the part of the vessel by which it is seized, and he doesn’t worry lest he come in contact with the liquids on its backside, and once again defile the trough.

ר' עקיבא אומר לכוסות – even for cups they have a place where he grabs hold of the vessel.

לידים הטמאות והטהורות – there is a distinction between the place where one grabs hold of the vessel and its backsides, for impure hands, as has been explained. But for pure hands, it is as it explains further on how so (see the next Mishnah). But Rabbi Yossi holds that for pure hands alone we should not be concerned, but for impure hands, we should be concerned. And the Halakha is according to the first Tanna/teacher, as Rabbi Yossi explains.