sorry there isn’t unless you coat it. no filament is food safe.
your own article you posted says this too in the 1st paragraph quote: “Although many companies list their PLA as “food safe”, there is no official certifying body to regulate such claims”
I posted about this in the french section under food safes when someone asked with the proper links if you search it I put a translation as well. → edit > link : Qualité alimentaire - #4 by Unique_Letterhead
Just because you think there are no microscopic holes picking up bacteria - there are unless you seal it afterwards - no 3d printer can claim this unless you have a hermetically sealed environment WITH nozzle as if it was a sterile surgery - the food 3d printers making actual food items to consume THAT would be the only printer you could possibly use TO print But then the filament fails at food safe as it doesn’t exist so that’s out as well. There just isn’t a way right now.
Not this sterile in your basement/house/living room/shop where the printer is now? Not food safe while printing and you don’t have a 145k food printer setup?
You need to seal it afterwards.
EDIT: let’s be clear here - you can print a cup in pla and drink water from it once or twice - it won’t hurt you. camping, one off’s things like that I totally get it. I am on the same page and I do the same for camping. one shots that are clean printed.
But printing a “glass” or “bowl” then claiming it’s food safe forever just wash it - nope. this is what I am stating here you can’t actually make right now.