Baby bottle

Mine wasn’t. Used Pigeon and Philips Avent. But they do advise you to wash and sterilise before the first use. Hope that helps your bottles

it’s some sort of gloss/polish, helps make the bottle looks “newer” just wash n sterilise before use

I never noticed this. I use the comotomo Bottle’s and they are soft and dry to touch

I never notice it. I will always wash and use hot water to sterilize it before using.

Same for my Philip milk containers too!

perhaps material..