PREMIUM PERSONALIZED GLASS COASTER: Made of high quality, durable GLASS. Our coaster is 1/8 inch thick and won't bend, crack, or shatter like similar plastic products. LARGE QUANTITY FOR A GREAT PRICE: 2 glass coaster comes with each order. PROTECTIVE COVERING INCLUDED: Both sides of our glass disks come with a protective covering on both sides to ensure that your acrylic comes unmarked and unscratched. ADHESIVE BUMPERS INCLUDED: Four Self-Adhesive Molded Polyurethane Bumpers come with each coaster. Bumpers prevent coasters from sliding and help reduce spills. Please always try to upload better-quality images or designs for better quality print.