These items are decorative metallic foil flakes, commonly used for crafting or cake decorating. 
Materials: Typically made from imitation gold and silver leaf, sometimes described as non-toxic leaf bits. 
Uses: Suitable for gilding resin crafts, nail art, painting, or decorating cakes and other food items. 
Packaging: Sold in small, clear plastic bottles with screw-on lids for easy application.