Twinkling H20s iridescent watercolors incorporate a proprietary blend of mica and other minerals that transmit refractive light and color, similar to light rays in a crystal. Each color is hand formulated offering a unique brilliance and clarity other watercolors simply cannot compare. We are proud to say “Made in the USA”. Hand poured today with the same green technology we use no fillers,toxic chemicals, stabilizers or antifungal Twinkling H20s are safe for all ages. They are a natural product and some irregularities or air bubbles may occur in the paint. Available in 210 colors: can be purchased individually in 10 ml large jar or 5 ml mini jar OR in 6pc, 12pc, and 24pc colour-themed sets.