NYX Cosmetics’ Holographic Halo Shimmer Stick collection
These are marketed as facial highlighters. While I have done this occasionally, I also use this as an eye effect. I like the sparse sparkle, the interference-shift color effect, and the easy application! It’s marketed at the “festival-makeup” crowd, but since I’m long past having patience with festivals but will outgrow breathing before I outgrown love of color, I find plenty of other ways to use this.