The NUK Action Cup is perfect for active toddlers, with a flexible straw that is gentle on their mouth and a twist-off lid for easy transport. It also features a ventilation valve for easy drinking. Made from high quality and safe materials, it is easy to clean and compatible with other NUK Evolution Cup products. The cup includes a pliable, gentle silicone straw that won't irritate baby's gums. An integrated air vent ensures uninterrupted flow while drinking, and the twist to close lid helps protect the straw while on the go. The cup's ergonomic shape makes it easy to hold, and it is also spill-proof and simple to assemble and clean. It is BPA-free and suitable for babies 12 months and up, holding 230ml of liquid.