I've got a glass kettle with a steel(?) base element (not coil) and it's worked fine for years. There is some black rust but I'm pretty sure that's harmless, an

I've got a glass kettle with a steel(?) base element (not coil) and it's worked fine for years. There is some black rust but I'm pretty sure that's harmless, and the water tastes clean. Much better than when I travel, I swear I can taste the plastic in the water in hotel kettles. So maybe it's just the brand. I did pay about $50 which is a little expensive but not extremely, and it's lasted over 10 years already.