The DV CE4+ clearo is made with a combination of polycarbonate and polypropylene (similar to the Vision Vivi Nova V3). When I was using them, I had both Root Beer and Key Lime in them for weeks without cracking issues. That was my experience, and I would recommend them for anything except Anise and Cinnamon (the worst of the tank crackers).Keep in mind that a lot of "tank crackers" don't crack right away. It can take time for it to degrade the plastic or cloud it up. I don't let cracking juices sit in my EVODs long.