The MilkBank Vented Feeding Bottle 5oz is triple-vented to prevent colic, spit-up, burping and gas.  The MilkBank Vented Feeding Bottle Eliminates nipple collapse and have less parts, are easy to use and clean! Additionally, LEAK PROOF ... GUARANTEED!  Compatible with MilkBank Vacuum Storage System.  Comes with the Stage 1 Nipple  Triple-vented, anti-colic  ??Delivers unrestricted milk flow to prevent colic, spit-up, burping, gas, and fluid in the ear. Result??a happier, less fussy baby. Less parts??easy to clean  ??Other vented bottles contain numerous parts that require a special cleaning brush. MilkBank is 100% dishwasher safe and does not require a cleaning brush. Clean up is quick and easy