In my opinion, most are safe to vape. Any of the well known companies on here are pretty safe bets (Mt Baker Vapor, Ahlusion, Virgin Vapor, etc). If I remember right though, the Evods are plastic, correct? Just be sure to read the product description on any
juice you
buy to make sure they don't crack plastic
tanks.
The only liquids that I have found unsafe was one from a new local store. It had stuff floating in it and the oils weren't mixing properly. It was also dyed blue, so I chucked it in the trash. I personally stay away from juices that are colored with any kinda of food coloring (tan, brown, or gold is okay, blue, red, green are colored)
Mt Baker Vapor is a good place to start. Lots of selection and good prices.