Can you reuse store-bought glass jars for storage, or do they require tevilat keilim?

I bought a jam that comes in a glass jar. When  I finish the jam, can I repurpose this jar to   use it for storage for other things or will  I need to do tevilat keilim, will I need to   immerse it in a mikvah first before I can use it?  Now, there are actually different opinions about   this. Rav Moshe Feinstein has a teshuva (answer)  where he writes that in this type of a case,   one could be lenient. It does not require tevilah,  specifically if it's glass. And he says that   since glass. The requirement to tovel is a mitzvah  mid'rabanan, when there are doubts, other reasons,   other mitigating factors, one could be lenient.  He says that it's not considered a "kli," it's   not considered a utensil. It's considered  like a peel around the food. So since the   glass doesn't serve as a normal utensil that  you use for putting in and taking out food,   it's just meant as a storage for this food item,  and it's meant to be thrown away afterwards,   the person who decides to reuse it,  they're the one who make it now into   utensil. It's considered like the Yid, like the  Jew made the utensil. Others, though have other   reasons why they're lenient to allow a person to  use the jar so long as it has the jam in it. But   they recommend that once you finish the jam, if  you indeed want to use it again, you should tovel   it. The Sredei Eish writes like this, that  one should title it if he's going to use the   jar. But until that point, they both say that one  could be lenient to use the jar without tevliah.