These are chopstick rests made with resin. They are designed to resemble two different types of ocean. Seashells and starfish are also made of resin and are attached to the outside. The area where the chopsticks are placed is made of acrylic, so it's safe. As these are handmade, there may be some air bubbles. Please consider purchasing only if you understand that these are handmade items. Please refrain from purchasing if you are looking for a perfect item or are overly concerned about minor imperfections. When using, please wipe off any dirt or gently hand wash. Avoid using a dishwasher as they are sensitive to heat.