Anything with toxic thermal paper immediately goes to the trash if I can help it. Other than arguably being bad for the environment (so much paper wasted) they can also be harmful to you simply from touch. E.g. "A significant increase in urinary total BPA concentration was observed for cashiers handling daily thermal paper receipts. " [1][2]
Does BPA exposure increase proportionally with receipt length? It would be interesting to, say, ink up your fingertips and then compare the area of ink transferred to different length receipts after handling them in a typical "toss into bag/pocket, skim when you get home, toss into trash" procedure.
Does that not feel terrible? Superglue feels like the tactile equivalent of nails-on-a-chalkboard to me. Though I suppose it's better than exposure to BPA
I can’t stand when I go to Mcdonals and ask to hold the pickle. They print a grill order receipt and tape it to the burger. It is a little receipt that states no pickle. All I can think when I see them is their ink is rubbing off on my fries.
What I noticed last time at McD's, is that the ink literally rubs off from the colorful paper mat (on the tray) on which I have been putting ketchup and fries my whole life. Try rubbing it with your finger next time, yikes.
fwiw, according to Dr. Gundry the buns and meat you are eating from McDonalds are carcinogenic and disrupt your hormones as well, so even if they didn't give you a receipt, you probably shouldn't be eating McDonald's anyway.