Dr. Brown's Natural Flow® Anti-Colic Options+™ Narrow Glass Baby Bottle, with Level 1 Slow Flow Nipple | Dr. Brown's Baby
Dr. Brown's Options Glass Baby Bottles, Single, 9 oz - Walmart.com
Thank me later - Don't throw the disks you get with Dr. Brown bottles. They act like seal & help avoid leak when you want to take milk in the bottle directly.
Dr. Brown's Natural Flow® Options+™ Narrow Glass Bottle Silicone Sleeves | Dr. Brown's Baby