Halakhah for Beitzah 3:8
אוֹמֵר אָדָם לַחֲבֵרוֹ, מַלֵּא לִי כְלִי זֶה, אֲבָל לֹא בַמִּדָּה. רַבִּי יְהוּדָה אוֹמֵר, אִם הָיָה כְלִי שֶׁל מִדָּה, לֹא יְמַלְאֶנּוּ. מַעֲשֶׂה בְאַבָּא שָׁאוּל בֶּן בָּטְנִית, שֶׁהָיָה מְמַלֵּא מִדּוֹתָיו מֵעֶרֶב יוֹם טוֹב וְנוֹתְנָן לַלָּקוֹחוֹת בְּיוֹם טוֹב. אַבָּא שָׁאוּל אוֹמֵר, אַף בַּמּוֹעֵד עוֹשֶׂה כֵן, מִפְּנֵי בֵרוּרֵי הַמִּדּוֹת. וַחֲכָמִים אוֹמְרִים, אַף בְּחֹל עוֹשֶׂה כֵן, מִפְּנֵי מִצּוּי הַמִּדּוֹת. הוֹלֵךְ אָדָם אֵצֶל חֶנְוָנִי הָרָגִיל אֶצְלוֹ, וְאוֹמֵר לוֹ, תֵּן לִי בֵּיצִים וֶאֱגוֹזִים בְּמִנְיָן, שֶׁכֵּן דֶּרֶךְ בַּעַל הַבַּיִת לִהְיוֹת מוֹנֶה בְּתוֹךְ בֵּיתוֹ:
A man may say to his neighbor: "Fill up this vessel for me," but not with the measure [i.e., with a vessel used for measuring and selling. But if it is not specifically used for that, even though it "stands" to replace the regular measuring vessel if it breaks, it is permitted to fill it (on yom tov)]. R. Yehudah says: If it were a measuring vessel, [even though he had not yet assigned it as such], he may not fill it. [The halachah is not in accordance with R. Yehudah.] Once, Abba Shaul b. Batnith filled his measures on yom tov eve, [it being forbidden to measure on yom tov], and gave them to his customers on yom tov. Abba Shaul says: He did so also on Chol Hamoed (because of the time it takes) to ascertain the exact measure, [in order to avoid neglect of Torah study. For many would come to make inquiries of him on Chol Hamoed, when they were not taken up with their work; and he would fill up his measures at night, when the house of study was not frequented, so as to be free in the daytime.] And the sages say: He did so also during the week because of the draining of the measures. [When he sold oil, he did so with many measures. The customers would bring their vessels and he would measure (oil) for each one separately. The oil would drain into their vessels the entire night so that no oil remained on the sides of his measures and the customers were not "cheated."] One may go to a shopkeeper that he regularly patronizes and ask him for a particular number of eggs or nuts; for it is customary for one to count in his house.