• Seals tight on all smooth, prevent from dust, airtight and leak proof, keep your coffee or tea hot. • Our drink covers made excellent gifts for any occasion! Mothers day, Christmas, Stocking Stuffers, Teachers, Birthdays, Gift Baskets ~ and more! • Size:10.5cm / 4.13 inch.Our Silicone Mug Covers are perfectly designed to keep your delicious beverage or drink clean and dust free in your favorite cup/mug with a precise fit size. Dishwasher safe. • Silicone can handle extreme temperatures without getting brittle or breaking and you never have to worry about handling a cover no matter how hot the tea is - the lids won’t heat up the way glass does.