Mishnayos Keilim Perek 2 Mishnah 6

גסטרא (a defective vessel – handles broken off or cracked) – fragments/broken earthenware vessels. And the thing divided into two, it is called גיסטרא /defective vessel (see Tractate Kelim, Chapter 4, Mishnah 3 for a definition: כל שנטלו אזניה/when its handles are split/broken off. And the language of גיסטרא is divided into two.

שנמצאת בכבשן – and we don’t know if it was broken prior to its being baked in the kiln/furnace and at the time when its manufacture was complete it did not have the status of a utensil/vessel upon it and not further on, it does defile because it is a defective vessel, or afterwards it was broken and defiles. But how do we verify the matter? We see if its shards are equivalent and its inside grows red, it is known that its manufacture was completed [first] and afterwards it became broken, and it defiles, for it was made to be a receptacle, for it is the manner to place a defective vessel underneath the jug/arched, pouched vessel to receive the liquid that drips from it.

טיטרוס (a perforated vessel, strainer, sprinkler) – a vessel which is perforated from below with many thin holes like the size of the hole of a needle and from above one hole like the size of a reed, that is a spindle that the women spin on, and when they fill it with water and a person places his finger in the hole from above so that the wind will not reach it no drop of water goes out from the small holes from below, but when he removes his finger, the water comes out.

ר' אלעזר בר צדוק מטהר – because it is perforated where the liquid enters.

ורבי יוסי מטמא – for this is the manner of how it is used, and it is considered a receptacle since the waters stand through the placing of the finger, but even without the placing of the finger, the water doesn’t leave other than like removing coins little by little, drop after drop., and because of this, it is not considered perforated like when brings in liquid to be purified through this And the Halakha is according to Rabbi Yossi.