Features: Material: Our Spill Proof water bottle cap is made of PP and quality silicone, safe and reliable. Sturdy enough for bites that can also be used as a relaxing teething toy. Practical design: The sealed snaps dust cover design keeps the straw clean. The components can be disassembled, making it easier for you to clean. Application: You can put this spill proof water bottle cap on your drinks bottle and drink it with a straw. The straw made of silicone is soft and not easy to deform Easy to clean: The straw and bottle cap of this product can be easily disassembled for easy cleaning.. Portable design: Portable and lightweight, practical for outdoor and travelling use, provide much convenience for you. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description Specifications: Suitable for 2.7cm diameter straws. The bottom is compatible with 6mm diameter straws, which can be purchased separately. Material: PP+Silicone