Dedicated to Breastfeeding Mothers. AVS™ Air Ventilation System Reduces Gas. Flat-Bottom & 6m+ Rocking Bottle. 100% Silicone Nipple. Hygienic Protective Cover. Wide Neck. BPA Free. With Slow & Fast Flow Nipples. Dishwasher & Microwave Safe Lansinoh®, the #1 brand in breastfeeding accessories, has been trusted by moms for over 25 years for providing high quality, effective products that meet her needs. Breastfeeding is Best.