[High-quality Materials] - The anatomic brain coasters come in 20 pieces. Fun coasters set made of acrylic, high temperature and low temperature resistant, strong and durable. Beautifully patterned and each coaster is coated with a sealant to prevent the decal from rubbing off. [Anti-slip] - Our brain slice coasters has four rubber on the bottom for non-slip. Stabilize the cup and Protect your table from scratches. When you enjoy a hot drink, it won't leave any marks on the table. It also doesn't make much noise when placing the cup on the table. [Easy To Clean & Store] - Hand wash only, you can also use a rag to gently wipe that clean. Cannot be put in the microwave. The coasters for drinks funny measures 4 inches, just right for a variety of mug sizes. [Interesting Organ Design] - Stacked in label order, you can see a 3D brain, fun and does not take up space. [Meaningful Neuroscience Gift] - This medical-coasters will be very meaningful as a thank you gift for doctors, nurses, medical-students, medical-staff. The weird coasters will also be a special decoration for the office, coffee table. Medical-school graduation gifts. Weird Gifts. Colour:As Shown Material:Acrylic Package Contents: 20 x coasters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.