This hot water bag stopper is made of plasticmaterial, anti-aging, no peculiar smell. Thehot water bagstopper is relatively supple, not easy to damage the bag mouth, and heat preservation is good, can always maintain the maximum area with the bag mouth. High density, not easy to break. Features -Color:As Shown -Material:Plastic -Size:4.00X3.50X3.50cm or 1.57X1.38X1.38in -Size(caliber):2.10X2.10X2.10cm or 0.83X0.83X0.83in -The right size of this water bottle stopper fits hot water bags well, with thread pattern design, owing good sealing function. -This replaceable stopper is very easy and simple to use and does not require a complicated operation process, ensuring efficiency and experience. -This stopper has a simple shape with excellent craftsmanship, which is both beautiful and practical, and the interesting shape is perfect for use. -This seal stopper is well-made, for the production of strict requirements, excellence and practical to use. -You can share the hot water sacksstopper with your family and friends because this bottle cap is practical, and they will be happy to receive it. Packing list5 x Hot Water Bag Stoppers