My MAM ones did the same with the UV steriliser. We had to change to Tommee Tippee bottles for a different reason but they haven’t yellowed at all really - strange!
I microwave sterilise mine and they havent gone yellow xx
Should see the state of the white rings on my nanobebe bottles 😭😭 it's the steriliser, I've bought new bottles and the steri dry instead, I hate how they look, makes me feel like they're dirty!!
What white rings on the nanobebe? Mine have gone slightly discoloured but not noticeable unless next to a non discoloured one but I have no white rings on them
It's the uv steriliser, I use nano bebe bottles and noticed the same thing so I goggled it and it states that it may cause slight yellowing.