These are chopstick rests made with resin. They are designed to resemble two different types of ocean. The part where you place the chopsticks is made of acrylic, so you can use them with peace of mind. Please consider purchasing only if you understand that these are handmade items. Please refrain from purchasing if you are looking for a perfect product or are overly concerned with minor details. When using, please wipe off any dirt or gently hand wash. Avoid using a dishwasher.