Feature 1Anti Spill: The silicone leak stoppers prevents drinks from spilling out of the straw and prevents dirt from entering, keeping the straw clean. 2Stopper Function: The square stoppers form a seal and holds the straw in place, the round leak proof stopper with an open design ensures that air can enter when drinking. 3Safe Material: Stoppers are made of safe silicone, durable and reusable, heat resistance, environmentally friendly for long term use without deformation. 4Practical Design: Spill proof stoppers are compact, lightweight, easy to install and portable, perfect for outdoor activities, bringing you more convenience in life. 5Daily Using: The upgraded design is suitable for most cups and bottles, and is a must have item for your travel with water cups.Item Type:CupSpillProofStopperMaterial:Silicone .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List2 x StrawCoverCap2 xSquareSpillStoppers2 x RoundSpillStoppers