Angiebubs, generally speaking, it is citrus/high acidic fruits, strong cinnamon, and cola/root beer flavors. Annette has made a note on each product page of each flavor that we carry that we don't recommend for use in plastic
tanks, and it includes pretty much every flavor under our "citrus" tab on the homepage. If you don't see the warning on the product page, you can assume it is a plastic-tank friendly flavor.
I have read on the forum-at-large that some tank-crackers do okay in the EVODS. (I don't use any tank-cracking flavors, so I can't back that up with personal experience.)
Here is a thread (again, on the forum-at-large) about some known tank-crackers from a wide range of vendors, but it is not an exhaustive list:
http://www.e-cigarette-forum.com/fo...ices-flavors-crack-tanks-ce2s-clearos-40.html