Tired of leaky bottles and lukewarm drinks? These SKISUNO silicone lid seal rings are a total game-changer! Made from durable, food-safe silicone, they fit perfectly onto your favorite water bottles, insulated tumblers, and even milk tea cups. The clever grooved design and sealing ring structure create an airtight seal, so you won't have to worry about spills in your bag or your drink going flat. It keeps hot drinks hot and cold drinks cold for longer, locking in flavor and temperature. Plus, they're super easy to pop off and clean—no hassle, no mess. Each pack comes with 4 rings (color: white, size: 6.00 x 4.50 x 0.25 cm), perfect for replacing worn-out gaskets or just having spares on hand. Great for daily use, gym, office, or travel. Say goodbye to drips and hello to reliable, fresh sips every time!