Are you looking for a practical hot water sack stopper? This item is your best choice. This material is not easy to heat conduction, will heat insulation. The heat in the water reduces the chance of loss from the cap to the air. So, this is a good replacement plug for hot water bag. Features -Color:White-Material:Rubber-Size:4.50X3.50X3.50cm/1.77X1.38X1.38in-This sealing stopper is simple in construction but very easy to use, ensuring its practicality.-The good sealing function hot water sacks stopperfits most types of hot water bags on the market, adding more practicality.-Our replaceable stopper is made from reliable materials that are resistant to breakage and deformation.-This stopper is lightweight and small, so it won't take up too much space for you, and it's easy and convenient to take and use anytime and anywhere.-This stopper for hot water bags is a surprise gift for those friends and family who love hot water bags.Packing list: 2 x Hot Water Bag Stoppers