DIY Nebula Bottle
These bottles are a cross between Nebular Jars, Sand Art, and Calming Bottles.
What is interesting about these Nebula Bottles, is that there is no paint in them, but there is sand. So all you need is for this DIY is glitter, food coloring, cotton balls and sand.
For DIY Sand Art, you can color your own sand or buy colored sand. Check out this tutorial from Crafting a Green World here.