"Press and Seal s#cks for food use in my experience, but we use it to apply numbing cream on my son's chest at home before he gets blood drawn from his port at the oncology clinic each week. It holds the cream in place and adheres to his skin well enough that the film doesn't get dislodged by the seat belt on the ride to the hospital. It comes off painlessly, which is not the case for any medical films we have tried. It's a strange little miracle in the pediatric oncology world."