I did something like that recently. I put some grape juice into a used plastic jug, and a balloon with a tiny air hole on the neck. Oh, and I also put some yeast and sugar into the mixture, for some reason. Apparently that tiny hole wasn't big enough, as I was experimenting by putting in 50% more yeast than normal. I opened the closet where it was store and took a look, and much of the 'juice' had escaped and caked on the side of the jug. I didn't realize that mixture must have forced the 'head' all the way up into the balloon. But the balloon had not exploded, so most likely it escaped out the neck of the jug, even though the balloon was quite tight there. Anyway, I drank some prematurely last night (it definitely needs more aging) and it should still be a good jug in spite of the overflow.
I don't really know about wine
skins, but I assume after one batch they are weakend to where they cannot contain the force of a new batch fermenting, which is what happened to my jug... but I don't think a used or unused balloon and jug would have made any difference

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