Product Placement Blog ➞ Health CarePurell Hand Sanitizer Used by Heath Ledger (Joker) in The Dark Knight (2008)July 6, 2018 Sergey Movie Hi! On Friday, July 6, I analyzed a Movie and product placement was spotted: Purell Hand Sanitizer Used by Heath Ledger (Joker) in The Dark Knight (2008).Here are 5 image(s) below: