(Mishnah): One may not puncture an eggshell and fill it with oil and put it on top of a lamp in order that the oil will drip into the lamp [on Shabbos. This is forbidden] even [if it drips] from a Kli Cheres;

R. Yehudah says, if the potter made it like this from the beginning, it is permitted.

One may not fill a bowl [next to a lamp] with oil and insert a wick to draw oil;

R. Yehudah permits.

(Gemara) Question: What is the reason (why it is forbidden)? Is it because each drop did not begin [burning before Shabbos]? Or, is it lest he forget and pour [take from the oil in the upper Kli]?

Question: What is the difference between them?

Answer: They argue about a flask that he tied (and it drips into the lamp). If you will say that it is because each drop did not begin, it did not begin. If you will say that it is lest he forget and pour, he will not forget and pour.

Answer #1: We learn from our Mishnah. If the potter made it like this from the beginning, it is permitted.

Note: R. Yehudah permits this, even though each drop did not begin burning before Shabbos! Rather, he is concerned only lest he take from the oil, and here he cannot pour out from the top Kli alone. The first Tana forbids even in this case, i.e. because each drop did not begin before Shabbos.

Rejection: There, it is all one Kli (it is as if all the oil began burning before Shabbos. We cannot learn from there.)

Answer #2 (Tosefta): If he connected [the two Kelim] through plaster or gypsum [on Erev Shabbos, it is permitted. Surely, the reason to forbid is lest he take, and here he cannot!]

Rejection: This is proper, according to R. Yehudah; he holds like he taught elsewhere. R. Yehudah says that Tofe'ach (moisture) of a liquid is a connection (so it is as if it all began burning. The first Tana forbids, for he does not consider it connected.)

Answer #3 (Beraisa): One wick in two cups, in two bowls or in two plates, it is forbidden. R. Yehudah permits.

Note: We can infer that R. Yehudah is never concerned lest he take. We minimize the argument, and assume that the first Tana agrees. They argue only about whether or not Maskeh Tofe'ach is a connection, so it is as if all started burning before Shabbos. This is why the first Tana forbids "even if it is of Cheres'', i.e. even though one is not wont to take oil from it. I was not satisfied with any of the Perushim I found; this Perush draws from some of them, but with changes - PF.

(R. Chananyah citing R. Pinchas): R. Yehudah teaches like he taught elsewhere. R. Yehudah says that Maskeh Tofe'ach is a connection.