I have not tested with anything over 80% VG, this is as high as we go, and I hadn't realised other vendors are doing over that with their short fills. Even our Pure VG in picnic works out at 80% VG, as the flavouring is diluted to 20% in PG, so a pure VG base and a flavouring in picnic is going to be 80%. I've checked a few short fills and they have no reference to what the actual base mix ratio is, if it's pure VG and flavouring, that would be odd, as we have found it's far easier to mix if you are diluting the flavouring in something like PG, mixing it straight into VG is going to require a lot of agitation to get it to mix evenly - I'm not a chemist so I may be wrong.