Federal agents say 88-year-old Saratoga man's invention is being used by meth labs

The U.S. Drug Enforcement Agency and state regulators say druggies can use the single ingredient in his "Polar Pure" water purifier -- iodine -- to make crystal meth.

Special Agent Richard Camps, a San Jose-based state narcotics task force commander, said he received reports of suspicious buyers.

"Weird-looking people, 'Beavis and Butt-Head'-types, were coming into camping stores and buying everything they had on the shelves," Camps said. "Then they would take off into the mountains and try to cook meth with it." The DEA reported agents found Polar Pure at a meth lab they dismantled in Tennessee two years ago.