SQUARE SHARP & DEEP TRAY DESIGN: The upgrade aquare coaster's thickness is [ 0.28''/ 7 mm], the deep hem design can hold more overflow of water, juice and liquor from the cup; [ Length and Width: 3.9''/ 10 cm. ] Big size suits all normal cups or mugs NON-SLIP BOTTEM & TOP: Double-sided design, available on both sides. Grooved pattern holds liquid to prevent leaking, raised ripple promote air flow to prevent coaster from sticking to glassware. Relax and enjoy fun time with your family or friends MAXIMIZE FURNITURE PROTECTION: The coasters can be used on any materials table type, like wood, granite, glass, bamboo plastic, marble, stone tables; Smart protect the surface of your counter tabletop or office desk from nasty marks or scary scratch LONG-TERM USE & HEAT RESISTANT & DISHWASHER AVAILABLE: The drink coasters are made of food grade silicone, can be used for cold or hot drinks in any occasion; enjoy your favorite alcohol, liquor, fruit juice or other beverage MUTI USE & OFFERS: Those versatile drinking coasters can be used as small trivet, pot holder, spoon rest, kitchen table pad, even the furniture feet floor cup for chairs and tables at home; If you have any questions, we will help you solve it