Recent research indicates that infants using polypropylene plastic baby bottles may ingest up to 1.6 million microplastic particles daily. The risk increases when bottles are heated for formula preparation, as heat triggers the release of microplastics and nanoplastics into the liquid. To reduce exposure, parents are switching to glass or food grade silicone alternatives. While glass is the most stable option, medical grade silicone is also considered a safer alternative to conventional plastics, though some studies suggest it can still emit nanoparticles at lower rates.
