Alot of you have ordered the Crystal Clear Polypropylene tubes on Cartomators over the last couple of months. Just wondering if they have proven to be as durable with harsh juices as the manufacturer claims. Anyone that has used them with Cinnamon or Citrus based juices and has info on how it has stood up, drop me a pm. Also I am considering adding glass tubes of some type also, I've played around with Fused Quartz and some Pyrex and have been pleased with them so far. The color Pyrex is known to leech color, so I won't mess with that. But again....thoughts on favorite glass type tubes that you would like offered would help me out.