Use your favorite colors of sand to layer a unique look and turn these Ring-Shaped Sand Art Bottles into an awesome work of art! A fun kids' activity, children can fill with school spirit or team colors and more! These circular sand bottles are sure to add a fun pop of color to a kids' room or bookshelf. Plastic. 5" x 3 1/2" Requires 48 oz. of total sand to fill all bottles. Sand and funnel sold separately online.