Dr. Brown s Natural Flow Options+ Glass Baby Bottle Sleeves 100% Silicone 9 oz Wide-Neck Glow in the Dark 9 oz Glow-in-the-Dark
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 Silicone Sleeve for 8oz Narrow Glass Bottle in Blue