This straw pack is only compatible to the older version sippy cup - gloss lid sippy cup in white packaging.
Two spare straws and a cleaning brush - especially for the b.box sippy cup. To replace straws, remove straw by pulling base of the straw to the side with your thumb and pull down to release. Cleaning brush is designed to clean inside the straw. Dishwasher safe. Made from PP and silicone, steel weighted ball. BPA, Phthalates and PVC free.