Thank you, I will definitely check this out 
You can get a metal version of the mini Vivi Nova by Vision. It's a top coil mini tank. I used metal tubes on the full sized version before I got into bottom coil tanks and the flavor was excellent. Certainly knocked the socks off a ce4.
MINI Vision Vivi Nova Tank System - Metal Tube
None of the iClears that I know of are made of Pyrex or any other crack proof material.
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