These are called "Calming Glitter Bottles". You're supposed to give them to children who need to calm down, but honestly I think it would help
me relax, too. I kind of want to make one in my new place. It's a mixture of...stuff, I'm not sure exactly what, but there are tons of recipes online. You shake it and then watch the pieces of glitter float and swirl, until they settle, and by then it's supposed to have soothed your mind/nerves a bit.
ETA: Though, MissCriss, I could totally see you just continually shaking it while yelling "GLITTEERRRRRRR"