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).)
Some poskim have indeed raised concerns when opening a bottle cap on Shabbat or Yom Tov, e.g., turning the cap into a receptacle (kli), completing the formation of a utensil (make bepatish), tearing (korea) and more (see e.g., here).
Shemirat Shabbat Kehilchata (9:22), after explaining one cannot remove the bottle cap of a bottle if that act converts it into a usable top which can be replaced and removed at will, writes
The various rules set out above are equally applicable on both Shabbat and Yom Tov.
And indeed the melachot possibly relevant to opening a soda bottle cap are not part of those permitted on Yom Tov for the sake of ochel nefesh (see here for the list).
For the avoidance of doubt, and as noted by Chacham Nisan in comments, there are many poskim who are lenient regarding soda bottles on both Shabbat and Yom Tov.