Get into the groove and keep your serving surfaces free from scratches, marks and water damage with these double-sided drink coasters. Crafted from BPA free food grade silicone, these round 3.94″ drink mats have a textured surface that prevents slipping. They can support temperatures from -40 to 480 degrees Fahrenheit, so they can also be used as serving trivets or even as a jar opener for those tough containers! Available in assorted colors. Add your organizational or company logo or message to customize. Orders of 10,000 units or greater are eligible for sea shipping. 100% guarantee for quality.