So many know that single use plastic water bottles break down with repeated use. Well the other day, I decided to buy a reusable water bottle. I am on a budget and picked up a Nike Hyperfuel 32oz. Its composition is 60% low density polyethylene/30% polypropylene/10% thermoplastic elastomer.

I bought with a little hesitation to be honest cause I have this fear since it’s plastic that it will break down and I will ingest tiny plastic particles even if it’s not severe as the single use ones. Any chemistry gurus out there that can tell me whether or not this type of plastics are susceptible to water break down?


closed as too broad by Jon Custer, Mithoron, andselisk, airhuff, Todd Minehardt Jan 11 at 1:11

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    $\begingroup$ Microplastic particles don't come from solid PE/PP, unless you leave them in the sun and/or under continuous mechanicals stess for a long time. It only breaks when it has become brittle, doesn't it? $\endgroup$ – Karl Jan 9 at 7:41
  • $\begingroup$ Your question is absolute: "Does it break down?" Certainly! However, is the amount significant, or even measurable? probably not $\endgroup$ – DrMoishe Pippik Jan 9 at 23:20
  • $\begingroup$ You are more likely to encounter microplastics as abrasive particles in "typical western hemisphere" toothpaste (except if it is made with cellulose particles, or you changed for other means of cleaning your teeth) than from daily reasonable use of a water bottle made of polymers. $\endgroup$ – Buttonwood Jan 10 at 23:23