Hi! I'm a cinnamon fan too! My juice melted drip tips, clearos and a vivi mini nova before I got a clue. Cinnamon is incompatible with polycarbonate, acrylic and Delrin (that I know of), which accounts for a lot of gear. Your choices come down to glass, polypropylene, metal and silicone. I have 3 glass IBtanks (with stainless steel caps) and a polypro tank from Valley View Vapes. I also use stainless steel or glass drip tips. If you don't want to use a tank, you can drip (minding what the tip is made of) or use a steel carto. You can actually use a clearo if you want to, but keep in mind it won't last very long (the drip tip will melt first btw). The tube part of a Vivi Nova will also melt. Vision has a metal tank for the vivi, but you can't see the juice level, and they have a product that at first glance appears to be metal with a window to see the juice, but it's actually just a decorative metal sleeve that goes over a regular polycarb tank, so it will melt too.
Illuminatu already posted a link to IBTanked, so here's one for Valley View Vapes. The tanks aren't the prettiest, and since they use grommets can be a pain to change cartos, but they are inexpensive and once they get going are little workhorses and very easy to refill.
Triple V Polypro Tanks