From the OU Daf Hakashrus:
Non-Dairy Creamer
Submitted by: Rabbi Yosef Wagner
I once asked Rav Belsky if someone can be
mevatel milk bshishim in ones coffee during
the six hour waiting period after eating meat.
[My application of this is to some non-dairy
creamers that have a little bit of milk in them
and since we do not say chanan on heter,
shishim is only needed against the little milk
in the non-dairy creamer.] He said yes, as
the minhag is on the gavra to wait six hours,
and thus would not violate ein mivatlin issur
lechatchila.