this post was submitted on 18 Feb 2025
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[–] GooberEar@lemmy.wtf 8 points 4 days ago (6 children)

Would a styrofoam cup actually stay in reasonably good shape for 400 years after being buried?

Mostly a curiosity thing. I sometimes use styrofoam peanuts in planters for drainage purposes, and after a single growing season, they've already started to show signs of degrading. Not that microplastics are a good thing, but it also makes me wonder if they would actually stick around in good condition for 400 years.

[–] Zink@programming.dev 10 points 4 days ago (4 children)

If it's actually make out of polystyrene, I've read that is supposed to take 500 years like a lot of other plastics.

Many packing peanuts are biodegradable these days though, so it might not be actual styrofoam (polystyrene + air).

[–] MrScottyTay@sh.itjust.works 1 points 4 days ago

I think the new ones are made from potato starch

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