Durable Construction: Crafted from BPA-free plastic and food-safe silicone, ensuring long-lasting use and peace of mind for health-conscious consumers. Leak-Proof Design: Features a secure sealing ring that effectively prevents leaks and spills, maintaining drink freshness and convenience on the go. Versatile Compatibility: Specifically designed to fit for Owala FreeSip 24/25/32/40oz cups, offering seamless integration for enhanced functionality and adaptability. Flavorful Experience: Easily convert for Owala FreeSip cups into CirKul flavor boxes with this adapter, allowing users to enjoy a variety of customized drinks effortlessly. Effortless Operation: Simple attachment to for Owala FreeSip cups enables quick insertion of flavor cartridges, facilitating instant enjoyment of personalized beverages with easy installation and cleaning. Item Name: Water Cup Adapter Material: Plastic Style: Modern And Simple Features: Effortless Operation, Versatile, Leak-Proof Design Size Details: Bottom Diameter: 7.85cm/3.09", Mouth Diameter: 5.6cm/2.2", Height: 3.3cm/1.3" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1/2 x Water Cup Adapter