Elderly woman sues McDonald’s for third-degree burns on her groin after coffee poured out of cup

Mable Childress , in her 80s , suffered third-degree burns to her groin, legs and abdomen, lawsuit alleges.

Lawsuit claims McDonald's employees failed to properly secure the coffee cup lid.

McDonald's says it has strict food safety protocols in place.

A similar coffee incident happened in 1994 , leading to the first coffee-related lawsuit against McDonald's .