I found these two bottles easy to use in 2021, so I bought two more in 2024 for my younger child. I sterilized them by boiling. There are few parts to wash, and I used various other bottles during the newborn period, but these were the most convenient. I have one relatively clean nipple part, and if you don't mind a used item and need it, I'll include it as a service, so please let me know in the comments.