Material: Made of BPA food grade silicone, FDA approved. No small (Dia 13cm/5.1 inch) durable,non-toxic, reusable and safe. Colorful: different color mug lids covers, diamond is removable and you can DIY rematch them as you like. Replaceable: If your lid becomes worn or damaged, you could choose our cup covers to replace. Application: It is very suitable for sealing coffee cups, glasses, plastic cups, jam jars, canned beer or cola, etc., to prevent dust from falling and maintain the temperature when you can't finish drinking. Outdoor assistant: This cup cover is very suitable for outdoor use. For example, when you are on a beach vacation or camping accommodation, our cup cover can help your quilt stay away from dust and flies and keep your drinks clean and hygienic.