I was thinking about the more open cage style lockets when talking about lava beads! Sort of like this or this. Something about the pompoms included look a little tacky for the office where I work. But you're definitely right! Most of the locket designs I saw for sale came with with small, washable felt pads for oil like this too. I just have a load of reservations buying things that probably cost $3 from a wholesale jewelry supplier with questionable mixed metals.