Just in case there are any fans of mbvs vanilla custard out there (like me) I thought I'd share some info about it: I emailed them and asked if any of their flavorings(custard especially) contained diketones(acetoin,diacetyl etc.) and they replied that they did NOT. I resubmitted that question the following day just to be sure and I got the same answer. Long story short, I just ordered a bunch more! Happy vaping everyone!