The thickened deep tray design provides reliable surface protection and spill management - Thickened deep tray: 0.28 inches (7 mm) thick with a deep hem to hold overflow from cups. Diameter 3.9 inches (10 cm). Large enough for most cups and mugs, as well as large mason jars, flasks, tumblers, beer steins, bourbon glasses, cola bottles, and pitcher jugs. - Nonslip bottom and nonstick top: Double-sided design with a grooved pattern to hold liquid and prevent leaks. Raised ripple promotes air flow to prevent coaster sticking to glassware. Suitable for indoor or outdoor use in homes, offices, restaurants, bars, weddings, parties, libraries, or beaches. - Maximizes furniture protection: Indoor and outdoor coasters work on wooden, granite, glass, bamboo, plastic, soapstone, sandstone, marble, and other stone tables. - Long-term use and dishwasher safe: Made of food-grade silicone; flexible and durable. Temperature range from 40 F to 480 F, suitable for hot or cold drinks. Enjoy beverages such as beer, wine, whiskey, tropical cocktails, ice water, soda, coffee, tea, or hot chocolate. Use scenarios: - Daily home use on kitchen or dining tables for hot coffee or cold beverages. - Outdoor gatherings on patios or at the beach, protecting furniture from drinks. - Commercial or social settings in offices, restaurants, or bars for reliable protection and easy cleaning.