I had never seen them or heard of them until my DD was mentioning them to me. I checked out her pintrest board and found this post which gave a pretty thorough instruction on how to make them.
Now since my DD stated she could not find the VOSS plastic water bottles I set out on a mission to make her some. Truthfully I think I am just avoiding finishing my DD.
I found my bottles mine at BevMo but did notice you can buy them online from Wal-Mart and obviously Amazon, but I didn't want to pay for shipping and whatever you do, do not go to CVS or Walgreens because despite VOSS's website that says they are sold there, they are not. At least not the ones in my area.
So I armed myself with the basics; glitter, corn syrup, food dye, hot water and a bottle then went ahead and added in some glue (just a few generous squirts, about 3.)
I used both fine and thick glitter on my first attempt (the blue one) to add some contrast. My second attempt (the purple) I used confetti along with the fine glitter and for my last attempt (orange) more confetti but I didn't have any Elmer's glue so I used Modge Podge which I decided I didn't care for and will probably redo.
So there you have it calming jars. These are just fun to play with on the table top and would be fun to have around the house, even for adults. I guess if you had a stressful job heck take one to work and have yourself a fun timeout.