The ceramic vases are uncoated on the outside and accept almost any type of decorative medium. Great with markers, paint, and more! • WHAT YOU GET: 12 ceramic vases are unfinished on the outside but clear coated on the inside to prevent seepage. No drainage hole. Pots measure 5" with a 1.6" diameter opening. Great for decorating with paint, markers, colored pencils, and collage supplies. • USES: Set of 12 ceramic vases are great for holiday craft projects, gift giving, creating a custom herb garden, and more! • BENEFITS: Arts & Crafts are great for creativity, motor skills, and creative thinking. • THE ART OF LEARNING: Colorations products are designed to encourage and foster learning within the arts and crafts world. • SAFE: All Colorations products are non-toxic and safe for children. We recommend this item for children ages 5 and up due to its fragility.