🥤NATURAL BAMBOO LID: The Natural Bamboo lid is an attractive, safe, and practical material that gives a premium look that sets itself apart from any other tumblers. The lid is well stationed on top that prevents it from leaks and spills while also being clean. | 🍀MADE OF FOOD GRADE SILICONE: Food Grade silicone is a non-toxic type of silicone that does not contain any chemical fillers or byproducts, making it safe for use with food. The 20 oz Glass Tumbler is made of Food Grade silicone with a 2.9”- 7.4” design, which can fit in most car cup holders. With a wide mouth slot, you can easily put coffee powder, ice cubes, etc. which is also easier to clean later on. | 💪SILICONE SLEEVES FOR BETTER GRIP: The sleeve also provides a grip that stops your hand from slipping and dropping the object to the ground and also stops your hands from getting wet from condensation. The silicone sleeve comes with a different variant of colors to easily identify your drink on the table. | 🎁A SMART GIFT: The re-usable tumblers are affordable and a great gift to have. They are great for home, work, and travel. The glass cup is a perfect gift for your family, friends, love ones, and also a perfect gift during ceremonies like Christmas or during mother’s, father’s day, or can offer as a birthday gift.