[Avodah] Avodah] Numbers and Letters on Bottlecaps

[Gershon Seif]

<<In Yalkut Yosef Hil. Shabbos vol. 2 p. 519 ROY paskens that if
letters are printed on a bottlecap so that when one opens the bottle one
rips the letters it is nevertheless permitted to open the cap on
Shabbos! ... His rationale (note 21) is that since he does not intend to erase the letters, even though it is a pesik reisha, since he has no hana'ah from the mechikah, and since this mocheik shelo al menas liktov is only assur
me'd'Rabbanan, it is permitted.>>

- Would Ashkenazim be permitted to rely on that?
- Would the same svara apply to opening bags (as far as the issue of mocheik is concerned)?