Why do we recommend this bottle bottom sleeve to you? The reason is that our bottle bottom sleeve is made of high-class silicone, which is sturdy and durable, and has good thermal insulation properties. And the simple and generous shape is also loved by many people. Don't hesitate anymore! Our silicone bottle bottom sleeve is your . Features -Material: Silicone. -Note: Suitable for water bottles with a diameter of 7-7.5cm. -It is made of high-grade silicone, lithe and flexible, which is not easy to deform. -The design is simple and generous, adapting to all kinds of bottles, and it will not look strange. -Lightweight, portable, easy to carry and use, it can bring you great convenience. -It is easy to clean, you can rinse it directly with water or with wet tissue. -It can increase the friction force, prevent dent, wear and impact, to prevent the water bottle will drop to the ground. Package list: 4 x bottle button covers