Bright red silicone square coasters create a firm, secure and differentiating non-slip surface on which to place glasses, utensils, plates, or anything you don’t want to slide away. Heat resistant to 470°. Set of 4, in red. Coasters can be a great tool to aid a person with either limited vision or shaky hands to keep items more secure in front of them. High contrast color makes them easy to spot on the table.