I think this is one of those typical China sweat shop verified buyer review scam operation. They send registered mail with cheap nonsense merchandise to US addresses, in order to obtain "verified buyer" status. Then these accounts are used to bot reviews on Amazon, or other online webshops. That's where these items come from.

https://www.forbes.com/sites/wadeshepard/2017/11/27/americans-are-receiving-unordered-parcels-from-chinese-e-criminals-and-cant-do-anything-about-it/

What reddit post? You linked an imgur link you faggot.

non-imgur link: https://files.catbox.moe/if6vs5.jpg

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https://ehp.niehs.nih.gov/wp-content/uploads/102/Suppl%2012/ehp.94102s1255a.pdf

That is to say, oh goy it's a total coincidence we had no idea that plastics were actually poisonous and exposure would basically equate to washing yourself in estrogen. We reallllly hope your children didn't put these in their mouthes or chew on them... : ^ )