In 2005, manufacturing conglomerate 3M placed $3 million inside ... the product wasn't "bulletproof glass," but rather a shatter-resistant film placed over the glass. What's Undetermined: It's ...

Further, the stunt only lasted one day, and the product at the center of the stunt was not bulletproof glass, but 3M's Scotchshield security window film. 3M's website describes the product as: … an ...