Over the Fourth of July holiday weekend, I showed my sister and niece how to make the bottlecap necklaces. Said sister made some of her own recently and has definitely improved upon what I showed her.
the top is more rounded than mine and she put the jump ring in before she poured so she didn't have to drill a hole. it was messy at first, and required a second pouring, but it looks darn good!

she used bigger beads for some

and a ball chain

cute, right?