Sensory bottles! They used Voss water bottles. Not sure where to find them but any water bottle will work. use mineral oil for a way to slow down the materials in the bottle. I usually do 2/3 water to 1/3 oil. Can also do just rice and small objects for I-Spy bottles.
Sensory Bottles | AWESOME explanation of the What, Why and How! Start of a new series, MUST PIN!
Another "calming jar" idea: your kids shake the bottle and then have to watch it till the glitter settles to the bottom. This one has the advantage of being in non-breakable plastic bottles. Also, you can superglue the lids on, so the kids don't open the bottles and drink the glitter glue while they're "calming down."
Creative Curriculum Objectives: 22, 26, 5, 24 Discovery bottles filled with colored water and glitter, rice and letters or numbers, or items related to a theme provide an opportunity for a time of self-directed exploration. After the initial exploration, student will search for specific objects in the bottle, discuss the contents of the bottle, and talk about cause and effect while moving or shaking the bottle.
Discovery in a Bottle: I decided to also use the Voss water bottles. It is worth it for the long term use of the bottles. They are very sturdy, no ridges like most bottled waters, and are easier for little curious minds to view what's inside them.