A teenage worker in a fast food hamburger store

A teenage worker in a fast food hamburger store was operating the french-fry machine. As normal, the grease was bubbling as the fresh cut potatoes were inserted to be fried. The young worker dropped his ballpoint pen into the boiling grease. He reached into the grease quickly to recover his pen, thinking he could get the pen out without being burned. He was off course badly burned on his wrist and hand. Does the young fast food worker have a claim against the french-fry machine manufacturer for Product Liability? Should the fast food store manager be held liable for the young worker’s injuries?