While the idea certainly isn't new, her's my take on the 3 peas in a pod earring that I made for my wife for Christmas. Quite simple construction, I started with a piece of paperboard and some scissors and cut until I got the shape that I wanted. I then traced them out on to a thin sheet of brass I had and with pliers folded in to a rough pod shape. The peas are made by melting some (lead free plumbing) solder with a torch. I soldered the ends first, then slipped the peas in and with a dull chisel bent the pod around them. Finally I used a fine brass wire wheel on a rotary tool for polishing.
This will probably be my last earring like thing I make. A bit too small and fiddly, a bit too much like the electronics I do for a living.