12 neon 3-D printed stitch markers!
 
Guys, how stinking cool are these?! Each stitch marker is printed on our home 3D printer. The material is flexible and crazy bright! 
 
Medium - fits up to a 5.5 mm, US 9 needle.  
Large - fits up to a 10 mm, US 15 needle
 
The bottom of your knitting bag is no match for these things! They don't technically glow in the dark, but they're so reflective that they are hard to miss. 
I've been using them and found no issues with snagging.