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In regards to opening plastic soda bottles on Shabbos I'm sure everyone knows there is a maklokes in this. Is the same maklokes applicable on Yom Tov, or is Yom Tov different so that according to everyone it is muter to open the bottles? (My sofek (doubt) is based on there being a heter to do some malachos on Yom Tov l'tzrich ochel nefesh (for the purpose of food for humans).)

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Wouldn't it depend what the reasons of those who prohibit are? If so, why aren't you including those details in your question when they seem extremely relevant? – Double AA Sep 19 '12 at 2:18
What maklokes? I quote from your link: "It is permissible to unscrew a plastic cap, even if it separates and leaves a ring around the bottle neck." The only bottle cap with a question is the metal one that has tabs that break on the bottom when you unscrew it. – Ariel Sep 19 '12 at 6:52
Certainly it would depend on the reasons for those that say it's ossur. Sorry for not listing those I simply pointed out that there is a maklokes in this. Those who prohibit it are for a few reasons. Either m'chatek or making a cli, etc. In regards to Yom Tov we permit the malachos "m'lisha v'eliech" in the seder of the malachos. My question is do these chashashes in regards to Shabbos fall into the category of malachos that are permitted on Shabbos or are ossur. Perhaps there are other points to take into account that someone could point out to me. – Yehoshua Sep 19 '12 at 8:24
I dont do it cause its tearing. But we deduced that biased off of the plain meaning of the prohibition and didnt factor in later heters by non authoritative rabbi's. But i do have to admit that im from a school of thought that goes with the stringent approach in most cases if there is a doubt. – Qoheleth Sep 19 '12 at 17:50
@Ariel In his defense, that isn't his link. See the revision history. To the best of my knowledge he is right about there being a machloket on the matter. – Double AA Sep 19 '12 at 19:48

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