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It's more than likely PLA/PHA plastic which is made from cornstarch and is biodegradable and food safe.https://en.wikipedia.org/wiki/BioplasticIt doesn't mean they degrade quickly or even over a lifetime, but they do degrade eventually and can be broken down beyond traditional petroleum based plastics. It's the safest form of plastic, however, it's still plastic. These forms can still cause ecological problems and to be broken down fully, depending on the chemistry, may require special conditions or equipment.
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