Easy to use, easy to clean. Flexible and non-stick, easy removal of contents. Great present for men, women and children, boys and girls, teenagers at Christmas, Halloween, birthday party. The molds are great for making pen holders, makeup brush storage jars, flower pots, mugs and home decor. Holds earrings, rings, bracelets, necklaces, for key chains, and more! The finished mug can also decorate your desktop for a more beautiful and neat look. The mold is silicone and is durable. for epoxy resin molds, UV resin molds, candle molds, plaster molds, etc.