Review on Nenesupply 9Oz Wide Mouth Feeding And Storage Bottle Compatible With Spectra S2, S1, And 9 Plus Pumps - Includes Nipple, Sealing Disc, And Compatible With Spectra S2 Accessories And Pump Parts by Daniel Mettler

updated 5/17/2016 - my son is 7mo old: Still using, hand washing and loving. I use these in addition to Kiinde bags (I typically will direct pump at work). These are really great, and I'll always grab this from the drawer over the pink Spectra bottles (with their weird 2-piece caps.).--- original post 11/10/2015 ---I have a Spectra S1 breast pump, and needed more bottles. Well, I love these 100x more than the Spectra bottles it came with! The lids fit so much tighter, and fits on the pump like a glove. I have hand washed, but the design has still started to fade off - including measurements, which could be problematic unless you are pouring into bags anyway.Update: I switched bottle brushes and no longer have any issues with markings coming off. My old one was a bristle style which seemed the norm, but I registered for MAM bottles which came in a set with a silicone bristle brush and I LOVE IT! Highly recommend. and you can but it separately, so search that now. RIGHT NOW! I throw the brush in every dishwasher run too :)