Professional Leak-Proof Design: These caps are engineered for 3ml glass vials, offering dual leak-proof protection that isolates moisture and contaminants. This design extends the shelf life of contents like reagents and sensitive liquids, minimizing waste and maintaining purity. Color-Coded Efficiency: Featuring 8 distinct colors (purple, white, pink, blue, red, yellow, green, black), our caps facilitate easy visual organization. This system enhances safety and efficiency in environments like labs and medical facilities by allowing quick identification by date, ingredient, or priority. Durable and Reusable: Crafted from high-quality, chemically stable materials, these caps resist corrosion, withstand high temperatures, and are suitable for repeated use. Their durability ensures long-term sealing performance and hygiene, even after multiple cleaning cycles. Versatile and Compatible: Perfectly sized for 3ml vials, these caps are ideal for a variety of uses, from storing laboratory reagents to model paints and pharmaceuticals. Their broad compatibility makes them essential for research labs, medical dispensing, DIY crafts, and home organization. User-Friendly Design: Each cap is designed for easy, one-handed operation, clicking securely into place for a reliable seal. The simple maintenance process-wash and air-dry-saves time and effort, making these caps ideal for frequent use in busy settings. Color: Multicolor Material: Silicone Package Contents: 16* Protective Cover