DIY Calm down sensory bottles are used for portable no mess safe sensory play for babies, toddlers, and preschoolers, to calm an anxious child, to help children learn to meditate, and as a "time out" timer for kids. This article includes links to resources available to help learn more about their uses and how to make DIY sensory bottles.
Glitter jars: How to make your own calm down jar or bottle
6 Ways to Make a Calm Down Jar by Preschool Inspirations-37--I made two jars and I think I'm hooked! I like how she shows different jars and talks a bit about how the different ingredients cause different settling times and effects.