Transparent, Material: Silicone, Non-Toxic, Machine Washable
Dr. Brown's Level 3 Narrow Baby Bottle Silicone Nipple - Medium-Fast Flow - 6pk - 6m+
Amazon
Dr. Brown's Natural Flow Baby Bottle Nipple - Level 3, Medium-Fast Flow - 6pk - 6m+
Babylist
Dr. Brown's Narrow Nipple in Clear/White | 100% Silicone