The Violet Moon plug is one of three moon plugs by XHale Glass. It is made of non-porous glass and can be sterilized by boiling. While this is the perfect plug for sharing with a partner, it is not perfect for anal beginners. Even though it is the smaller of the three moon plugs, it is still too big for those just starting out. The small size does make it a perfect plug for semi-long term wear and for traveling. It even comes with a handy padded pouch to keep it safe! XHale really does know how to make a perfect glass toy. There aren't any bubbles or imperfections in the glass. It is definitely worth the money.