PTFE (Teflon is a brand name) isn’t the ultimate non-stick surface. It has very low friction, but so do many other materials.
Its popularity comes from its low cost *compared to other non-stick surfaces* , but it’s very fragile *as a coating*. Compare a Teflon coated pan to an enameled pan. The enamel will have similar non-stick properties but be more durable and heat resistant. *PTFE becomes unstable at around ~~300~~ 500^o F, enamel at around ~~500~~ 800^o F which is past the point of catastrophic failure for PTFE* *Had some conversions Mixe up*
Your toilet is made of glazed porcelain, which is almost as non-stick as PTFE, but about 1,000 times more durable.
Edit: grammar
EDIT 2: clarifications italicized
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