Cherub Baby Straw Cup Adaptor Pack for Wideneck Bottles converts a wideneck bottle into a straw cups. Fits Cherub Baby and other brands. It makes a perfect addition your wide-neck collection. The straw cup adaptor pack transitions the baby bottle into a toddler non-spill BPA Free Straw Spout. Simply remove the teat from your wide-neck bottle and replace with the straw spout. Also includes ergonomic removable handles.