(Mishnah): A Garuf Mulyar, one may drink from it on Shabbos.

Inference: If it was not Garuf, no (one may not drink from it. PNEI MEIR - we permit a Kirah that was Katum but not Garuf. Why is this more stringent?)

Explanation #1 (R. Shein): This is because the coals touch [the Kli] itself [so it is hotter than a Kirah].

Explanation #2 (R. Chaninah brei d'R. Hillel): This is because the air enters the Kli itself, and the coals flare up.

Explanation #3 (R. Yosi bei R. Bun): It is because it is made of components, and he fears lest the [tin] that sticks them together melt [when the water was poured out and the Kli gets very hot - PNEI MEIR], and he will add water [which will be cooked].

An Antichi, even if it was Garuf, one may not drink from it.

(R. Chananyah citing R. Yosi citing R. Acha Aba citing R. Yochanan); This is because it is heated from its walls. (It is like Hatmanah is something that adds heat - PNEI MEIR.)

(Rabanan of Kisarin citing Rav Huna citing Rav): If it was swept and open (above or below, so the heat escapes) it is permitted.

(Mishnah): If one cleared a [hot] kettle, one may not put water in it to get hot, but one may put water in it or in a cup to become lukewarm.

(Gemara - R. Ba bar brei d'R. Chiya bar Ba citing R. Chiya citing R. Yochanan): [One may put water to become lukewarm] only into a cup, but not into [the kettle].

Question (R. Mana, to R. Ba): Did R. Yochanan not learn [like our text of] the Seifa [which explicitly permits], and did he not learn [like our text of] the Reisha "in order to get hot'', which implies that to become lukewarm is not [forbidden]?!

(R. Ba bar Kahana citing Rav): If he wants to make it hot, it is forbidden. If it is to become lukewarm, it is permitted.