This stopper is made of wood material, anti-aging, no peculiar smell. The stopper is relatively supple, not easy to damage the bottle mouth, and heat preservation is good, can always maintain the maximum area with the bottle mouth. High density, not easy to break. Features -Color:Multi -Material:Wood, metal -Size:4.50X4.50X3.50cm/1.77X1.77X1.38in (Large Size) -Size:4.00X3.50X3.50cm/1.57X1.38X1.38in (Small Size) -The right size of this water bottle stopper fits bottles well, with thread pattern design, owing good sealing function. -This replaceable Bottle Stopper is very easy and simple to use and does not require a complicated operation process, ensuring efficiency and experience. -This handy stopper from us has a simple shape with excellent craftsmanship, which is both beautiful and practical, and the interesting shape is perfect for use. -This household kettle stopper is well-made, for the production of strict requirements. -You can share the water bottle stopper with your family and friends because this bottle stopper is practical. Package list: 2 x kettle stoppers large size 2 x kettle stoppers small size