Similar to my hips, at this phase of life! 
Tortoise shell is a thermoplastic that can be shaped with heat, moisture, and pressure. Now you know.
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Indeed, I read Egyptians used tortoise shells softened in hot oil to craft food instruments approximately 2000BC. And in Europe during middle age, horn was a very popular natural polymer used to make durable, flexible and nice looking utilitian objects.
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I learned that recently while studying for a personal project in a must read book on plastic : https://www.amazon.fr/dp/1285061233 by Dr. Erik Lokensgard https://www.linkedin.com/in/erik-lokensgard-ba3886130 …
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