If a child is so upset she cannot be consoled or engaged in other calming activities (like she doesn’t want to be touched, hugged, or talked to), these Calm Down Bottles can serve as a visual “anchor” in order to bring her focus into one place when it may feel like her world is spinning out of control. She can shake the bottle as hard as she wants (so don’t use a glass bottle), and this provides calming proprioceptive input to her body while also serving as a physical outlet that is less destructive than hitting or kicking. While she holds the bottle and watches the glitter fall, her hands and eyes are brought to midline and this can help organize and center her nervous system as well. And as her heart pounds and she demonstrates fast, shallow breathing from being so upset, the slow fall of the shaken glitter can serve as a visual model that, often unconsciously, can slow her heart rate and respiration.
Source Article from http://worldtruth.tv/calming-jars-are-taking-internet-by-storm-people-all-over-the-internet-are-obsessed-with-this-mason-jar-trend/