if any condom was offered that was not in its original package and not opened in front of you, i would run a mile.
but a lady might be suspicious if you suddenly pulled out your own dom.
negotiate first, usually ok to use your own.
do condoms have washing instructions on them?

cold wash, do not tumble dry and no ironing.
nb i am joking about washing doms, but is that the inference by bringing them out in a plastic bag?