Mysterious Triangle

Ever wonder what those triangles on the bottom of plastic containers mean? You know, the recycling triangle with the little numbers and letters? It’s called the SPI (Society of the Plastics Industry) Resin Identification Code, and it’s used to tell recyclers what kind of plastic is in the container.

Most plastic containers are made out of six different resins–thus there are seven codes, six for the common resins and one for Other. Here’s a very useful chart showing symbols and properties.

If you have a hard time remembering those, try these instead*:

This is Pete, the cute crime-solving plastic with the curly lid. He is most often used in combination with Link and Julie.

HDPE stands for High Density Physical Education. This plastic floats in water, to assist those of us who don’t.

This is the plastic the aliens used to make their human masks.

As you may have guessed, LDPE stands for Low Density Physical Education. This plastic flies through the air, to assist those of us who don’t.

PP is an especially sterile plastic, used for storing urine samples**.

PS is the plastic you forget to mention until you’ve mentioned all the other plastics.

Other, as in Them. Avoid at all costs.

* I’m full of crap, of course.

** C’mon, you know I had to.

Oh, and by the way:



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