I switched to formula feeding very early on, so I only used the breast pump 2 or 3 times. However, I used the baby bottles and SS-sized nipples for about two months, so they show signs of use. I sterilized both by boiling after each use and stored them at home. I have confirmed that they are working today. I will also include breast milk storage bags. I opened the box, but I didn't end up using any of them. Please understand that these are used items before purchasing. *Due to shipping costs, the breast milk storage bags may be shipped without the box. *I am also selling other childcare items, so I can offer a discount if you purchase multiple items. - Brand: Pigeon - Model Name: Handy Fit - Type: Electric