"Mamma was shocked and I couldn't eat for two days," Milica said.
She said her mother also suffered a loss of appetite.
"She's started to eat again, but she's never going to buy filmjolk again," the daughter said.
Katarina Malmstrom, a spokeswoman for the Arla dairy firm, said the company is investigating the incident but "there's not a chance" the foreign objects made their way into the bottle during packaging.
"It's a closed process and there are filters and things that would stop something so large from ending up in a container," Malmstrom said.
