So I always see these signs and numbers on plastic containers, what do they mean?
[Here’s a photo of those numbers/signs from something I just threw away.](https://imgur.com/K1krehk)
In: Chemistry
The two circles with the numbers around the outside and the arrows indicate the year and month the part was produced.
The triangle tells what sort of recyclable plastic it is.
The 13 is most likely a part number that is really only relevant to the factory producing it for organizational/inventory purposes.
I have no idea what that square is.
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