milk bottle material for UV sterilizer

Yes my PP bottles have turned cloudy and when I googled it seems that they may emit other chemicals as they smell a bit burnt. PPSU is much more good quality and able to withstand more stress (from uv/steam sterilizer), they also have a longer lifespan of 6months - 1 year. https://shopee.sg/product/242594539/5732034154?smtt=0.0.9

My Philips avent PP bottles n accompanying teats all turn yellowish after awhile! I haven’t read that this yellowing would have any harmful effects on baby so should be ok?

I get HeorShe milk bottle so i do not need to get sterilizer machine

Heard for Pp after uv sterilizer will turn yellow