92 posted 3 years ago by SpiralOutlier 3 years ago by SpiralOutlier +92 / -0 46 comments share 46 comments share save hide report block hide replies
I'm not saying I believe this entirely, but here's what I found online. They're supposed to be burial vaults. "It's used in several states in the US where ground subsidence is an issue in graveyards."
https://www.metabunk.org/threads/debunked-fema-coffins-plastic-grave-liners.904/
So, OP, is ground subsidence an issue where you live? Why not call the fire station and see what they have to say about them.