The play pearls are in a recyclable sealable PET jar with a screw cap so you can easily store the mix again. The jars come in 2 sizes, jars of approximately 430 grams and jars of 850 grams. The play mix is colored with CE certified non-toxic acrylic paint. * The products are tested and provided with a CE mark. Recommended age is 3 years and older, always play under adult supervision and not for consumption.