If you search for that, there's some different answers, but the consensus seems to be that you should NOT consider anything you print to be food safe. Even though some filaments could be food safe, there's no guarantee that the end result after being heated and passed through the printer, etc., will still be safe.
The other concern I have often seen is that 3d printed objects do not have the same smooth surface as commercially produced food/kitchen items and that means a lot more "stuff" can accumulate or grow on those more rough surfaces.
However you can also make your own determinations about all that. If you were to make this and stick it in a lemon now and then, how might that affect your health? If there is something toxic that transfers to the lemon juice, how toxic? How much of it? Will occasional exposure matter?
Not just that. There will also always be a small amount of abrasion in and on the print. Which isn't foodsafe at all.
PLA, for example, is foodsafe itself - but the fdm process used in printing isn't.
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