Keep extras of our spill proof replacement straws on hand for all of your Munchkin Click Lock straw cups so a loose or lost straw won't keep your kids from their favorite cups. The soft, flexible silicone straws have a valve that prevents spills, and it fits all Munchkin Click Lock flip style Straw Cup lids. Kids find drinking fun and easy, while mom loves keeping tables and furniture clean. So make sure it isn't the last straw for you.