It's easy to find a special kind of bouncing balls with a liquid that moves just like the memories in the film! I'll try to find some video to show you. BTW, that's a really cool looking vial! Is there any chance I can buy one as well?
Edit: Well, it's not a video, but I think it will do. Those stripes and waves does move floating inside the ball. When I saw them on a local shop it was the first thing that came to my mind. I hope it's useful!
Right away before reading all the posts I thought of combining two liquid soaps or shampoo for this. I've created the same effect accidentally a few times when I've added clear soap to refill containers having a bit of pearlescent soap left in the bottom.
I used a heavy dental floss that I shredded a little bit and suspended it in a light amber colored bath gel. The label was made using parchment paper (the kind used for baking) and punched with a Fiskar paper punch I believe I got from Joann's. I taped this to an 8-1/2x11 sheet and ran it through a printer to add the writing.