Beebaby Flippy Soft Silicone Straw Cup is non-spill and leak proof, preventing any unwanted spilling and mess. It is integrated with anti-leak valve and flip top design to prevent spills. It is easy to assemble and clean. It encourages babies to drink on their own by flexing mouth muscles and develops self-feeding skills. Great For Self-Feeding. Convenient: Light Weight, Durable, Ideal For Both Indoor And Outdoor Use. Made of 100% BPA Free PP material. Extremely light weighted, easy to carry, easy to clean.