oil cans
all good info here and i have used all of these methods in the last 40 years....but i do remember P&W putting out a line maint news letter[in the days of hard copy info]telling all about the dangers of using screw drivers to open oil cans,as they cause slivers of metal,P&W advised all to use sharp pointed can openers or the self opening spouts that mobil used to give away with cartons of oil...most guys will remember the spout pourers used to wear after about opening a dozen cans and oil would pour out the sides and we would try to repair them,and the rubber seal would swell and not seal.....aahhhh them were the days MJ2 all over the place