itzik
your logic doesn’t make so much sense in my opinion. just because you think it makes sense to toivel plastic, doesn’t mean it does. a rav/posek makes such a decision. does this have any basis from such a source or just some stupid person who thinks he is being “machmir”. you can’t just come up with your own halachos or even chumros. they have to have some basis in reality! why do you think it is more strange to toivel cardboard rather than plastic? they both seem equally strange to me! (I am coming from a place where we toivel alumanim pans, maaser all israeli products [but only food, not our plastic dishes] and do various other chumros that many people never heard of. But they ALL have a basis in Halacha. Of course others who don’t do these things are perfectly frum. But this is what we do and that’s fine, as long as there is a basis to it. If I decide that we should maaser our dishes or toivel our food or do anything of the sort than I am a crazy lunatic, not machmir. As oomis says, if there is a basis in halacha and someone who we hold by comes out with a psak I will be second in line after her 🙂 )