Medela Breast milk Bottle Spare Parts Convenient mesh bag for cleaning bottle parts in the dishwasher - and keeping them together! For use with Medela wide base nipples and breast milk bottles. Perfect for long-term breast milk storage. 3 Slow-Flow Wide Base Nipples Medela wide base silicone nipples are available in slow and slow flow for feeding newborns and infants. 3 pack Natural feel and shape complements breastfeeding. Compatible with all Medela breast milk bottles. Dishwasher and microwave safe.