with less training than your typical hamburger flipper or pizza
delivery boy one can mix juice.
if the bottles are 10 ml or more nic base can easily be added
to juice by eye ball.the nic is in a base anyway. the actual nic
content will have a slight margin of error maybe 13 or 11
instead of 12 even but, so what?
what makes people think some kind of contamination will
happen if juice is not made in some kind of hermetically sealed
temperature and air controlled sterile environment.
every thing is in a container of some sort.
PG,VG and alcohol which most flavors are diluted in
are naturally antibiotic and antiviral.
if they are not mixing it with their fingers what is going
to happen? nothing.
i have heard here of past incidents of mistakes by makers
in the past. only one involving nicotine itself. way to much was
added. it was quickly discovered and the maker notified and
the problem was resolved as far as i know.
other than that what could possibly happen except getting
some bad tasting juice.
who would use ingredients that would harm their customers?
how would contaminants get into juice without deliberately
adding them? why is this not happening right now?
are there not laws already that would make any of
these activities illegal?
making juice is simple,easy,cheap and inherently safe.
the nature of the ingredients and manufacturing process
make it so.
1. measure ingredients.
2.put measured ingredients in a container.
3.mix.
now you have e-juice.
enjoy.

regards
mike