This leak-proof replacement lid is designed for Owala Freesip bottles in 16oz to 40oz sizes. Made of BPA-free plastic, it features a round shape and comes in a vibrant blue color. The durable construction and precision seal ensure that it is leak-proof, making it perfect for all occasions, particularly sports and travel. With one-button operation and impact-resistant design, this replacement lid is a practical and efficient choice for your on-the-go hydration needs.