Children who are already able to drink independently from a cup can easily do so with a straw. With the Nuk Flexi Cup (from 12 months, ideal for transportation), you can ensure the required amount of fluids throughout the day in a pleasant and playful way. Thanks to the valve in the straw, leaks are avoided. The package includes two silicone straws as replacements for the Nuk Flexi Cup. So, if the straw wears out or gets lost, you can easily replace it. These replacement straws are only compatible with the new round straw base of the Nuk Flexi Cup. They cannot be combined with other straw bases.