For a bit maybe until you get the balloon, but I would highly recommend a
bung and an airlock (Under $2 total). Neither the hole in the cap nor the
balloon will stop a fruit fly, other undesirable beasties, or contaminants
which could ruin your wine.
Darlene

"kingvitamin" wrote in message
om...
hello i am making balloon wine and ironically i have no balloon. so
for an airlock i thought i would put a small hole in the cap of my
2liter bottle for my airlock, would that work?