There were seveal postings about how to get Mylar (trade name for Dupont PET) to take a set other than the flat sheet that it comes in. This material goes through a transition from a glassy state (stiff) to a rubbery state at 82 deg C (180 deg F). Wrap the stiff PET around something that has the radius of what you need that can take the temperature. Get the Mylar above that temperature and allow it to cool while still in that shape. It will hold that radius when it gets back to the glassy state. There are many packages, bottles and objects thermoformed or molded in this way. Lee Murray
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