This hot water bag stopper has excellent material, is safe and practical, has no peculiar smell, and has good heat insulation effect. The materials have strong thermal insulation properties. So, this is a good replacement stopper for hot water bags, etc. You will love these good kitchen helpers. Features -Color:White -Material:Rubber -Size:4.50X3.50X3.50cm/1.77X1.38X1.38in -Note:The diameter is 21.4mm/0.84inch -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. -You can share the hot water sacks stopper with your family and friends because this bottle cap is practical, and they will be happy to receive it. Package list: 2 Water Bag Stoppers